689979.0000000

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{20089}}^1$

素因数の和:20111

約数の個数: 24

約数和(自身を含む): 11812920

約数和(自身を除く): 6589780

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 20089, 40178, 80356, 100445, 200890, 261157, 401780, 522314, 1044628, 1305785, 2611570, 5223140]

約数ペア:

[(1, 5223140), (2, 2611570), (4, 1305785), (5, 1044628), (10, 522314), (13, 401780), (20, 261157), (26, 200890), (52, 100445), (65, 80356), (130, 40178), (260, 20089)]