81120640

素因数分解:

$2^7\times 5^1\times {\mathrm{126751}}^1$

素因数の和:126770

約数の個数: 32

約数和(自身を含む): 193930560

約数和(自身を除く): 112809920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 126751, 253502, 507004, 633755, 1014008, 1267510, 2028016, 2535020, 4056032, 5070040, 8112064, 10140080, 16224128, 20280160, 40560320, 81120640]

約数ペア:

[(1, 81120640), (2, 40560320), (4, 20280160), (5, 16224128), (8, 10140080), (10, 8112064), (16, 5070040), (20, 4056032), (32, 2535020), (40, 2028016), (64, 1267510), (80, 1014008), (128, 633755), (160, 507004), (320, 253502), (640, 126751)]