640490448

素因数分解:

$2^4\times 3^1\times {\mathrm{13}}^1\times {\mathrm{1026427}}^1$

素因数の和:1026451

約数の個数: 40

約数和(自身を含む): 1781879008

約数和(自身を除く): 1141388560

約数列:

[1, 2, 3, 4, 6, 8, 12, 13, 16, 24, 26, 39, 48, 52, 78, 104, 156, 208, 312, 624, 1026427, 2052854, 3079281, 4105708, 6158562, 8211416, 12317124, 13343551, 16422832, 24634248, 26687102, 40030653, 49268496, 53374204, 80061306, 106748408, 160122612, 213496816, 320245224, 640490448]

約数ペア:

[(1, 640490448), (2, 320245224), (3, 213496816), (4, 160122612), (6, 106748408), (8, 80061306), (12, 53374204), (13, 49268496), (16, 40030653), (24, 26687102), (26, 24634248), (39, 16422832), (48, 13343551), (52, 12317124), (78, 8211416), (104, 6158562), (156, 4105708), (208, 3079281), (312, 2052854), (624, 1026427)]