31291280

素因数分解:

$2^4\times 5^1\times {\mathrm{181}}^1\times {\mathrm{2161}}^1$

素因数の和:2355

約数の個数: 40

約数和(自身を含む): 73188024

約数和(自身を除く): 41896744

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 181, 362, 724, 905, 1448, 1810, 2161, 2896, 3620, 4322, 7240, 8644, 10805, 14480, 17288, 21610, 34576, 43220, 86440, 172880, 391141, 782282, 1564564, 1955705, 3129128, 3911410, 6258256, 7822820, 15645640, 31291280]

約数ペア:

[(1, 31291280), (2, 15645640), (4, 7822820), (5, 6258256), (8, 3911410), (10, 3129128), (16, 1955705), (20, 1564564), (40, 782282), (80, 391141), (181, 172880), (362, 86440), (724, 43220), (905, 34576), (1448, 21610), (1810, 17288), (2161, 14480), (2896, 10805), (3620, 8644), (4322, 7240)]