20915459328

素因数分解:

$2^8\times 3^1\times {\mathrm{991}}^1\times {\mathrm{27481}}^1$

素因数の和:28491

約数の個数: 72

約数和(自身を含む): 55723822336

約数和(自身を除く): 34808363008

約数列:

[1, 2, 3, 4, 6, 8, 12, 16, 24, 32, 48, 64, 96, 128, 192, 256, 384, 768, 991, 1982, 2973, 3964, 5946, 7928, 11892, 15856, 23784, 27481, 31712, 47568, 54962, 63424, 82443, 95136, 109924, 126848, 164886, 190272, 219848, 253696, 329772, 380544, 439696, 659544, 761088, 879392, 1319088, 1758784, 2638176, 3517568, 5276352, 7035136, 10552704, 21105408, 27233671, 54467342, 81701013, 108934684, 163402026, 217869368, 326804052, 435738736, 653608104, 871477472, 1307216208, 1742954944, 2614432416, 3485909888, 5228864832, 6971819776, 10457729664, 20915459328]

約数ペア:

[(1, 20915459328), (2, 10457729664), (3, 6971819776), (4, 5228864832), (6, 3485909888), (8, 2614432416), (12, 1742954944), (16, 1307216208), (24, 871477472), (32, 653608104), (48, 435738736), (64, 326804052), (96, 217869368), (128, 163402026), (192, 108934684), (256, 81701013), (384, 54467342), (768, 27233671), (991, 21105408), (1982, 10552704), (2973, 7035136), (3964, 5276352), (5946, 3517568), (7928, 2638176), (11892, 1758784), (15856, 1319088), (23784, 879392), (27481, 761088), (31712, 659544), (47568, 439696), (54962, 380544), (63424, 329772), (82443, 253696), (95136, 219848), (109924, 190272), (126848, 164886)]