40399280

素因数分解:

$2^4\times 5^1\times {\mathrm{504991}}^1$

素因数の和:505004

約数の個数: 20

約数和(自身を含む): 93928512

約数和(自身を除く): 53529232

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 504991, 1009982, 2019964, 2524955, 4039928, 5049910, 8079856, 10099820, 20199640, 40399280]

約数ペア:

[(1, 40399280), (2, 20199640), (4, 10099820), (5, 8079856), (8, 5049910), (10, 4039928), (16, 2524955), (20, 2019964), (40, 1009982), (80, 504991)]