18311920

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{20809}}^1$

素因数の和:20833

約数の個数: 40

約数和(自身を含む): 46447920

約数和(自身を除く): 28136000

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 20809, 41618, 83236, 104045, 166472, 208090, 228899, 332944, 416180, 457798, 832360, 915596, 1144495, 1664720, 1831192, 2288990, 3662384, 4577980, 9155960, 18311920]

約数ペア:

[(1, 18311920), (2, 9155960), (4, 4577980), (5, 3662384), (8, 2288990), (10, 1831192), (11, 1664720), (16, 1144495), (20, 915596), (22, 832360), (40, 457798), (44, 416180), (55, 332944), (80, 228899), (88, 208090), (110, 166472), (176, 104045), (220, 83236), (440, 41618), (880, 20809)]