20649720

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1$

素因数の和:126

約数の個数: 256

約数和(自身を含む): 79994880

約数和(自身を除く): 59345160

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 13, 14, 15, 20, 21, 24, 26, 28, 30, 31, 35, 39, 40, 42, 52, 56, 60, 61, 62, 65, 70, 78, 84, 91, 93, 104, 105, 120, 122, 124, 130, 140, 155, 156, 168, 182, 183, 186, 195, 210, 217, 244, 248, 260, 273, 280, 305, 310, 312, 364, 366, 372, 390, 403, 420, 427, 434, 455, 465, 488, 520, 546, 610, 620, 651, 728, 732, 744, 780, 793, 806, 840, 854, 868, 910, 915, 930, 1085, 1092, 1209, 1220, 1240, 1281, 1302, 1365, 1464, 1560, 1586, 1612, 1708, 1736, 1820, 1830, 1860, 1891, 2015, 2135, 2170, 2184, 2379, 2418, 2440, 2562, 2604, 2730, 2821, 3172, 3224, 3255, 3416, 3640, 3660, 3720, 3782, 3965, 4030, 4270, 4340, 4758, 4836, 5124, 5208, 5460, 5551, 5642, 5673, 6045, 6344, 6405, 6510, 7320, 7564, 7930, 8060, 8463, 8540, 8680, 9455, 9516, 9672, 10248, 10920, 11102, 11284, 11346, 11895, 12090, 12810, 13020, 13237, 14105, 15128, 15860, 16120, 16653, 16926, 17080, 18910, 19032, 22204, 22568, 22692, 23790, 24180, 24583, 25620, 26040, 26474, 27755, 28210, 28365, 31720, 33306, 33852, 37820, 39711, 42315, 44408, 45384, 47580, 48360, 49166, 51240, 52948, 55510, 56420, 56730, 66185, 66612, 67704, 73749, 75640, 79422, 83265, 84630, 95160, 98332, 105896, 111020, 112840, 113460, 122915, 132370, 133224, 147498, 158844, 166530, 169260, 172081, 196664, 198555, 222040, 226920, 245830, 264740, 294996, 317688, 333060, 338520, 344162, 368745, 397110, 491660, 516243, 529480, 589992, 666120, 688324, 737490, 794220, 860405, 983320, 1032486, 1376648, 1474980, 1588440, 1720810, 2064972, 2581215, 2949960, 3441620, 4129944, 5162430, 6883240, 10324860, 20649720]

約数ペア:

[(1, 20649720), (2, 10324860), (3, 6883240), (4, 5162430), (5, 4129944), (6, 3441620), (7, 2949960), (8, 2581215), (10, 2064972), (12, 1720810), (13, 1588440), (14, 1474980), (15, 1376648), (20, 1032486), (21, 983320), (24, 860405), (26, 794220), (28, 737490), (30, 688324), (31, 666120), (35, 589992), (39, 529480), (40, 516243), (42, 491660), (52, 397110), (56, 368745), (60, 344162), (61, 338520), (62, 333060), (65, 317688), (70, 294996), (78, 264740), (84, 245830), (91, 226920), (93, 222040), (104, 198555), (105, 196664), (120, 172081), (122, 169260), (124, 166530), (130, 158844), (140, 147498), (155, 133224), (156, 132370), (168, 122915), (182, 113460), (183, 112840), (186, 111020), (195, 105896), (210, 98332), (217, 95160), (244, 84630), (248, 83265), (260, 79422), (273, 75640), (280, 73749), (305, 67704), (310, 66612), (312, 66185), (364, 56730), (366, 56420), (372, 55510), (390, 52948), (403, 51240), (420, 49166), (427, 48360), (434, 47580), (455, 45384), (465, 44408), (488, 42315), (520, 39711), (546, 37820), (610, 33852), (620, 33306), (651, 31720), (728, 28365), (732, 28210), (744, 27755), (780, 26474), (793, 26040), (806, 25620), (840, 24583), (854, 24180), (868, 23790), (910, 22692), (915, 22568), (930, 22204), (1085, 19032), (1092, 18910), (1209, 17080), (1220, 16926), (1240, 16653), (1281, 16120), (1302, 15860), (1365, 15128), (1464, 14105), (1560, 13237), (1586, 13020), (1612, 12810), (1708, 12090), (1736, 11895), (1820, 11346), (1830, 11284), (1860, 11102), (1891, 10920), (2015, 10248), (2135, 9672), (2170, 9516), (2184, 9455), (2379, 8680), (2418, 8540), (2440, 8463), (2562, 8060), (2604, 7930), (2730, 7564), (2821, 7320), (3172, 6510), (3224, 6405), (3255, 6344), (3416, 6045), (3640, 5673), (3660, 5642), (3720, 5551), (3782, 5460), (3965, 5208), (4030, 5124), (4270, 4836), (4340, 4758)]