64986640

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{19813}}^1$

素因数の和:19867

約数の個数: 40

約数和(自身を含む): 154786968

約数和(自身を除く): 89800328

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 19813, 39626, 79252, 99065, 158504, 198130, 317008, 396260, 792520, 812333, 1585040, 1624666, 3249332, 4061665, 6498664, 8123330, 12997328, 16246660, 32493320, 64986640]

約数ペア:

[(1, 64986640), (2, 32493320), (4, 16246660), (5, 12997328), (8, 8123330), (10, 6498664), (16, 4061665), (20, 3249332), (40, 1624666), (41, 1585040), (80, 812333), (82, 792520), (164, 396260), (205, 317008), (328, 198130), (410, 158504), (656, 99065), (820, 79252), (1640, 39626), (3280, 19813)]