21572040

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{421}}^1$

素因数の和:503

約数の個数: 128

約数和(自身を含む): 75352320

約数和(自身を除く): 53780280

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 61, 70, 84, 105, 120, 122, 140, 168, 183, 210, 244, 280, 305, 366, 420, 421, 427, 488, 610, 732, 840, 842, 854, 915, 1220, 1263, 1281, 1464, 1684, 1708, 1830, 2105, 2135, 2440, 2526, 2562, 2947, 3368, 3416, 3660, 4210, 4270, 5052, 5124, 5894, 6315, 6405, 7320, 8420, 8540, 8841, 10104, 10248, 11788, 12630, 12810, 14735, 16840, 17080, 17682, 23576, 25260, 25620, 25681, 29470, 35364, 44205, 50520, 51240, 51362, 58940, 70728, 77043, 88410, 102724, 117880, 128405, 154086, 176820, 179767, 205448, 256810, 308172, 353640, 359534, 385215, 513620, 539301, 616344, 719068, 770430, 898835, 1027240, 1078602, 1438136, 1540860, 1797670, 2157204, 2696505, 3081720, 3595340, 4314408, 5393010, 7190680, 10786020, 21572040]

約数ペア:

[(1, 21572040), (2, 10786020), (3, 7190680), (4, 5393010), (5, 4314408), (6, 3595340), (7, 3081720), (8, 2696505), (10, 2157204), (12, 1797670), (14, 1540860), (15, 1438136), (20, 1078602), (21, 1027240), (24, 898835), (28, 770430), (30, 719068), (35, 616344), (40, 539301), (42, 513620), (56, 385215), (60, 359534), (61, 353640), (70, 308172), (84, 256810), (105, 205448), (120, 179767), (122, 176820), (140, 154086), (168, 128405), (183, 117880), (210, 102724), (244, 88410), (280, 77043), (305, 70728), (366, 58940), (420, 51362), (421, 51240), (427, 50520), (488, 44205), (610, 35364), (732, 29470), (840, 25681), (842, 25620), (854, 25260), (915, 23576), (1220, 17682), (1263, 17080), (1281, 16840), (1464, 14735), (1684, 12810), (1708, 12630), (1830, 11788), (2105, 10248), (2135, 10104), (2440, 8841), (2526, 8540), (2562, 8420), (2947, 7320), (3368, 6405), (3416, 6315), (3660, 5894), (4210, 5124), (4270, 5052)]