1260841264

素因数分解:

$2^4\times {\mathrm{79}}^1\times {\mathrm{499}}^1\times {\mathrm{1999}}^1$

素因数の和:2585

約数の個数: 40

約数和(自身を含む): 2480000000

約数和(自身を除く): 1219158736

約数列:

[1, 2, 4, 8, 16, 79, 158, 316, 499, 632, 998, 1264, 1996, 1999, 3992, 3998, 7984, 7996, 15992, 31984, 39421, 78842, 157684, 157921, 315368, 315842, 630736, 631684, 997501, 1263368, 1995002, 2526736, 3990004, 7980008, 15960016, 78802579, 157605158, 315210316, 630420632, 1260841264]

約数ペア:

[(1, 1260841264), (2, 630420632), (4, 315210316), (8, 157605158), (16, 78802579), (79, 15960016), (158, 7980008), (316, 3990004), (499, 2526736), (632, 1995002), (998, 1263368), (1264, 997501), (1996, 631684), (1999, 630736), (3992, 315842), (3998, 315368), (7984, 157921), (7996, 157684), (15992, 78842), (31984, 39421)]