646702940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{2487319}}^1$

素因数の和:2487341

約数の個数: 24

約数和(自身を含む): 1462544160

約数和(自身を除く): 815841220

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 2487319, 4974638, 9949276, 12436595, 24873190, 32335147, 49746380, 64670294, 129340588, 161675735, 323351470, 646702940]

約数ペア:

[(1, 646702940), (2, 323351470), (4, 161675735), (5, 129340588), (10, 64670294), (13, 49746380), (20, 32335147), (26, 24873190), (52, 12436595), (65, 9949276), (130, 4974638), (260, 2487319)]