16640180

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{26839}}^1$

素因数の和:26879

約数の個数: 24

約数和(自身を含む): 36072960

約数和(自身を除く): 19432780

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 26839, 53678, 107356, 134195, 268390, 536780, 832009, 1664018, 3328036, 4160045, 8320090, 16640180]

約数ペア:

[(1, 16640180), (2, 8320090), (4, 4160045), (5, 3328036), (10, 1664018), (20, 832009), (31, 536780), (62, 268390), (124, 134195), (155, 107356), (310, 53678), (620, 26839)]