71287280

素因数分解:

$2^4\times 5^1\times {\mathrm{891091}}^1$

素因数の和:891104

約数の個数: 20

約数和(自身を含む): 165743112

約数和(自身を除く): 94455832

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 891091, 1782182, 3564364, 4455455, 7128728, 8910910, 14257456, 17821820, 35643640, 71287280]

約数ペア:

[(1, 71287280), (2, 35643640), (4, 17821820), (5, 14257456), (8, 8910910), (10, 7128728), (16, 4455455), (20, 3564364), (40, 1782182), (80, 891091)]