20961460

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{80621}}^1$

素因数の和:80643

約数の個数: 24

約数和(自身を含む): 47405736

約数和(自身を除く): 26444276

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 80621, 161242, 322484, 403105, 806210, 1048073, 1612420, 2096146, 4192292, 5240365, 10480730, 20961460]

約数ペア:

[(1, 20961460), (2, 10480730), (4, 5240365), (5, 4192292), (10, 2096146), (13, 1612420), (20, 1048073), (26, 806210), (52, 403105), (65, 322484), (130, 161242), (260, 80621)]