21821520

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{419}}^1$

素因数の和:473

約数の個数: 160

約数和(自身を含む): 79994880

約数和(自身を除く): 58173360

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 31, 35, 40, 42, 48, 56, 60, 62, 70, 80, 84, 93, 105, 112, 120, 124, 140, 155, 168, 186, 210, 217, 240, 248, 280, 310, 336, 372, 419, 420, 434, 465, 496, 560, 620, 651, 744, 838, 840, 868, 930, 1085, 1240, 1257, 1302, 1488, 1676, 1680, 1736, 1860, 2095, 2170, 2480, 2514, 2604, 2933, 3255, 3352, 3472, 3720, 4190, 4340, 5028, 5208, 5866, 6285, 6510, 6704, 7440, 8380, 8680, 8799, 10056, 10416, 11732, 12570, 12989, 13020, 14665, 16760, 17360, 17598, 20112, 23464, 25140, 25978, 26040, 29330, 33520, 35196, 38967, 43995, 46928, 50280, 51956, 52080, 58660, 64945, 70392, 77934, 87990, 90923, 100560, 103912, 117320, 129890, 140784, 155868, 175980, 181846, 194835, 207824, 234640, 259780, 272769, 311736, 351960, 363692, 389670, 454615, 519560, 545538, 623472, 703920, 727384, 779340, 909230, 1039120, 1091076, 1363845, 1454768, 1558680, 1818460, 2182152, 2727690, 3117360, 3636920, 4364304, 5455380, 7273840, 10910760, 21821520]

約数ペア:

[(1, 21821520), (2, 10910760), (3, 7273840), (4, 5455380), (5, 4364304), (6, 3636920), (7, 3117360), (8, 2727690), (10, 2182152), (12, 1818460), (14, 1558680), (15, 1454768), (16, 1363845), (20, 1091076), (21, 1039120), (24, 909230), (28, 779340), (30, 727384), (31, 703920), (35, 623472), (40, 545538), (42, 519560), (48, 454615), (56, 389670), (60, 363692), (62, 351960), (70, 311736), (80, 272769), (84, 259780), (93, 234640), (105, 207824), (112, 194835), (120, 181846), (124, 175980), (140, 155868), (155, 140784), (168, 129890), (186, 117320), (210, 103912), (217, 100560), (240, 90923), (248, 87990), (280, 77934), (310, 70392), (336, 64945), (372, 58660), (419, 52080), (420, 51956), (434, 50280), (465, 46928), (496, 43995), (560, 38967), (620, 35196), (651, 33520), (744, 29330), (838, 26040), (840, 25978), (868, 25140), (930, 23464), (1085, 20112), (1240, 17598), (1257, 17360), (1302, 16760), (1488, 14665), (1676, 13020), (1680, 12989), (1736, 12570), (1860, 11732), (2095, 10416), (2170, 10056), (2480, 8799), (2514, 8680), (2604, 8380), (2933, 7440), (3255, 6704), (3352, 6510), (3472, 6285), (3720, 5866), (4190, 5208), (4340, 5028)]