21115920

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{12569}}^1$

素因数の和:12592

約数の個数: 80

約数和(自身を含む): 74816640

約数和(自身を除く): 53700720

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 56, 60, 70, 80, 84, 105, 112, 120, 140, 168, 210, 240, 280, 336, 420, 560, 840, 1680, 12569, 25138, 37707, 50276, 62845, 75414, 87983, 100552, 125690, 150828, 175966, 188535, 201104, 251380, 263949, 301656, 351932, 377070, 439915, 502760, 527898, 603312, 703864, 754140, 879830, 1005520, 1055796, 1319745, 1407728, 1508280, 1759660, 2111592, 2639490, 3016560, 3519320, 4223184, 5278980, 7038640, 10557960, 21115920]

約数ペア:

[(1, 21115920), (2, 10557960), (3, 7038640), (4, 5278980), (5, 4223184), (6, 3519320), (7, 3016560), (8, 2639490), (10, 2111592), (12, 1759660), (14, 1508280), (15, 1407728), (16, 1319745), (20, 1055796), (21, 1005520), (24, 879830), (28, 754140), (30, 703864), (35, 603312), (40, 527898), (42, 502760), (48, 439915), (56, 377070), (60, 351932), (70, 301656), (80, 263949), (84, 251380), (105, 201104), (112, 188535), (120, 175966), (140, 150828), (168, 125690), (210, 100552), (240, 87983), (280, 75414), (336, 62845), (420, 50276), (560, 37707), (840, 25138), (1680, 12569)]