21125520

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1$

素因数の和:130

約数の個数: 240

約数和(自身を含む): 79755312

約数和(自身を除く): 58629792

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 15, 16, 18, 20, 24, 26, 30, 36, 37, 39, 40, 45, 48, 52, 60, 61, 65, 72, 74, 78, 80, 90, 104, 111, 117, 120, 122, 130, 144, 148, 156, 180, 183, 185, 195, 208, 222, 234, 240, 244, 260, 296, 305, 312, 333, 360, 366, 370, 390, 444, 468, 481, 488, 520, 549, 555, 585, 592, 610, 624, 666, 720, 732, 740, 780, 793, 888, 915, 936, 962, 976, 1040, 1098, 1110, 1170, 1220, 1332, 1443, 1464, 1480, 1560, 1586, 1665, 1776, 1830, 1872, 1924, 2196, 2220, 2257, 2340, 2379, 2405, 2440, 2664, 2745, 2886, 2928, 2960, 3120, 3172, 3330, 3660, 3848, 3965, 4329, 4392, 4440, 4514, 4680, 4758, 4810, 4880, 5328, 5490, 5772, 6344, 6660, 6771, 7137, 7215, 7320, 7696, 7930, 8658, 8784, 8880, 9028, 9360, 9516, 9620, 10980, 11285, 11544, 11895, 12688, 13320, 13542, 14274, 14430, 14640, 15860, 17316, 18056, 19032, 19240, 20313, 21645, 21960, 22570, 23088, 23790, 26640, 27084, 28548, 28860, 29341, 31720, 33855, 34632, 35685, 36112, 38064, 38480, 40626, 43290, 43920, 45140, 47580, 54168, 57096, 57720, 58682, 63440, 67710, 69264, 71370, 81252, 86580, 88023, 90280, 95160, 101565, 108336, 114192, 115440, 117364, 135420, 142740, 146705, 162504, 173160, 176046, 180560, 190320, 203130, 234728, 264069, 270840, 285480, 293410, 325008, 346320, 352092, 406260, 440115, 469456, 528138, 541680, 570960, 586820, 704184, 812520, 880230, 1056276, 1173640, 1320345, 1408368, 1625040, 1760460, 2112552, 2347280, 2640690, 3520920, 4225104, 5281380, 7041840, 10562760, 21125520]

約数ペア:

[(1, 21125520), (2, 10562760), (3, 7041840), (4, 5281380), (5, 4225104), (6, 3520920), (8, 2640690), (9, 2347280), (10, 2112552), (12, 1760460), (13, 1625040), (15, 1408368), (16, 1320345), (18, 1173640), (20, 1056276), (24, 880230), (26, 812520), (30, 704184), (36, 586820), (37, 570960), (39, 541680), (40, 528138), (45, 469456), (48, 440115), (52, 406260), (60, 352092), (61, 346320), (65, 325008), (72, 293410), (74, 285480), (78, 270840), (80, 264069), (90, 234728), (104, 203130), (111, 190320), (117, 180560), (120, 176046), (122, 173160), (130, 162504), (144, 146705), (148, 142740), (156, 135420), (180, 117364), (183, 115440), (185, 114192), (195, 108336), (208, 101565), (222, 95160), (234, 90280), (240, 88023), (244, 86580), (260, 81252), (296, 71370), (305, 69264), (312, 67710), (333, 63440), (360, 58682), (366, 57720), (370, 57096), (390, 54168), (444, 47580), (468, 45140), (481, 43920), (488, 43290), (520, 40626), (549, 38480), (555, 38064), (585, 36112), (592, 35685), (610, 34632), (624, 33855), (666, 31720), (720, 29341), (732, 28860), (740, 28548), (780, 27084), (793, 26640), (888, 23790), (915, 23088), (936, 22570), (962, 21960), (976, 21645), (1040, 20313), (1098, 19240), (1110, 19032), (1170, 18056), (1220, 17316), (1332, 15860), (1443, 14640), (1464, 14430), (1480, 14274), (1560, 13542), (1586, 13320), (1665, 12688), (1776, 11895), (1830, 11544), (1872, 11285), (1924, 10980), (2196, 9620), (2220, 9516), (2257, 9360), (2340, 9028), (2379, 8880), (2405, 8784), (2440, 8658), (2664, 7930), (2745, 7696), (2886, 7320), (2928, 7215), (2960, 7137), (3120, 6771), (3172, 6660), (3330, 6344), (3660, 5772), (3848, 5490), (3965, 5328), (4329, 4880), (4392, 4810), (4440, 4758), (4514, 4680)]