81299840

素因数分解:

$2^7\times 5^1\times {\mathrm{127031}}^1$

素因数の和:127050

約数の個数: 32

約数和(自身を含む): 194358960

約数和(自身を除く): 113059120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 127031, 254062, 508124, 635155, 1016248, 1270310, 2032496, 2540620, 4064992, 5081240, 8129984, 10162480, 16259968, 20324960, 40649920, 81299840]

約数ペア:

[(1, 81299840), (2, 40649920), (4, 20324960), (5, 16259968), (8, 10162480), (10, 8129984), (16, 5081240), (20, 4064992), (32, 2540620), (40, 2032496), (64, 1270310), (80, 1016248), (128, 635155), (160, 508124), (320, 254062), (640, 127031)]