201639280

素因数分解:

$2^4\times 5^1\times {\mathrm{2520491}}^1$

素因数の和:2520504

約数の個数: 20

約数和(自身を含む): 468811512

約数和(自身を除く): 267172232

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 2520491, 5040982, 10081964, 12602455, 20163928, 25204910, 40327856, 50409820, 100819640, 201639280]

約数ペア:

[(1, 201639280), (2, 100819640), (4, 50409820), (5, 40327856), (8, 25204910), (10, 20163928), (16, 12602455), (20, 10081964), (40, 5040982), (80, 2520491)]