19899895

素因数分解:

$5^1\times {\mathrm{37}}^1\times {\mathrm{263}}^1\times {\mathrm{409}}^1$

素因数の和:714

約数の個数: 16

約数和(自身を含む): 24678720

約数和(自身を除く): 4778825

約数列:

[1, 5, 37, 185, 263, 409, 1315, 2045, 9731, 15133, 48655, 75665, 107567, 537835, 3979979, 19899895]

約数ペア:

[(1, 19899895), (5, 3979979), (37, 537835), (185, 107567), (263, 75665), (409, 48655), (1315, 15133), (2045, 9731)]