18943640

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{11551}}^1$

素因数の和:11603

約数の個数: 32

約数和(自身を含む): 43666560

約数和(自身を除く): 24722920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 11551, 23102, 46204, 57755, 92408, 115510, 231020, 462040, 473591, 947182, 1894364, 2367955, 3788728, 4735910, 9471820, 18943640]

約数ペア:

[(1, 18943640), (2, 9471820), (4, 4735910), (5, 3788728), (8, 2367955), (10, 1894364), (20, 947182), (40, 473591), (41, 462040), (82, 231020), (164, 115510), (205, 92408), (328, 57755), (410, 46204), (820, 23102), (1640, 11551)]