81819980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{131}}^1\times {\mathrm{167}}^1$

素因数の和:335

約数の個数: 96

約数和(自身を含む): 201180672

約数和(自身を除く): 119360692

約数列:

[1, 2, 4, 5, 10, 11, 17, 20, 22, 34, 44, 55, 68, 85, 110, 131, 167, 170, 187, 220, 262, 334, 340, 374, 524, 655, 668, 748, 835, 935, 1310, 1441, 1670, 1837, 1870, 2227, 2620, 2839, 2882, 3340, 3674, 3740, 4454, 5678, 5764, 7205, 7348, 8908, 9185, 11135, 11356, 14195, 14410, 18370, 21877, 22270, 24497, 28390, 28820, 31229, 36740, 43754, 44540, 48994, 56780, 62458, 87508, 97988, 109385, 122485, 124916, 156145, 218770, 240647, 244970, 312290, 371909, 437540, 481294, 489940, 624580, 743818, 962588, 1203235, 1487636, 1859545, 2406470, 3719090, 4090999, 4812940, 7438180, 8181998, 16363996, 20454995, 40909990, 81819980]

約数ペア:

[(1, 81819980), (2, 40909990), (4, 20454995), (5, 16363996), (10, 8181998), (11, 7438180), (17, 4812940), (20, 4090999), (22, 3719090), (34, 2406470), (44, 1859545), (55, 1487636), (68, 1203235), (85, 962588), (110, 743818), (131, 624580), (167, 489940), (170, 481294), (187, 437540), (220, 371909), (262, 312290), (334, 244970), (340, 240647), (374, 218770), (524, 156145), (655, 124916), (668, 122485), (748, 109385), (835, 97988), (935, 87508), (1310, 62458), (1441, 56780), (1670, 48994), (1837, 44540), (1870, 43754), (2227, 36740), (2620, 31229), (2839, 28820), (2882, 28390), (3340, 24497), (3674, 22270), (3740, 21877), (4454, 18370), (5678, 14410), (5764, 14195), (7205, 11356), (7348, 11135), (8908, 9185)]