18388240

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17681}}^1$

素因数の和:17707

約数の個数: 40

約数和(自身を含む): 46043928

約数和(自身を除く): 27655688

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 17681, 35362, 70724, 88405, 141448, 176810, 229853, 282896, 353620, 459706, 707240, 919412, 1149265, 1414480, 1838824, 2298530, 3677648, 4597060, 9194120, 18388240]

約数ペア:

[(1, 18388240), (2, 9194120), (4, 4597060), (5, 3677648), (8, 2298530), (10, 1838824), (13, 1414480), (16, 1149265), (20, 919412), (26, 707240), (40, 459706), (52, 353620), (65, 282896), (80, 229853), (104, 176810), (130, 141448), (208, 88405), (260, 70724), (520, 35362), (1040, 17681)]