20725640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{39857}}^1$

素因数の和:39881

約数の個数: 32

約数和(自身を含む): 50221080

約数和(自身を除く): 29495440

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 39857, 79714, 159428, 199285, 318856, 398570, 518141, 797140, 1036282, 1594280, 2072564, 2590705, 4145128, 5181410, 10362820, 20725640]

約数ペア:

[(1, 20725640), (2, 10362820), (4, 5181410), (5, 4145128), (8, 2590705), (10, 2072564), (13, 1594280), (20, 1036282), (26, 797140), (40, 518141), (52, 398570), (65, 318856), (104, 199285), (130, 159428), (260, 79714), (520, 39857)]