18197740

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{181}}^1\times {\mathrm{457}}^1$

素因数の和:658

約数の個数: 48

約数和(自身を含む): 42011424

約数和(自身を除く): 23813684

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 181, 220, 362, 457, 724, 905, 914, 1810, 1828, 1991, 2285, 3620, 3982, 4570, 5027, 7964, 9140, 9955, 10054, 19910, 20108, 25135, 39820, 50270, 82717, 100540, 165434, 330868, 413585, 827170, 909887, 1654340, 1819774, 3639548, 4549435, 9098870, 18197740]

約数ペア:

[(1, 18197740), (2, 9098870), (4, 4549435), (5, 3639548), (10, 1819774), (11, 1654340), (20, 909887), (22, 827170), (44, 413585), (55, 330868), (110, 165434), (181, 100540), (220, 82717), (362, 50270), (457, 39820), (724, 25135), (905, 20108), (914, 19910), (1810, 10054), (1828, 9955), (1991, 9140), (2285, 7964), (3620, 5027), (3982, 4570)]