20415340

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{1307}}^1$

素因数の和:1398

約数の個数: 48

約数和(自身を含む): 47464704

約数和(自身を除く): 27049364

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 71, 110, 142, 220, 284, 355, 710, 781, 1307, 1420, 1562, 2614, 3124, 3905, 5228, 6535, 7810, 13070, 14377, 15620, 26140, 28754, 57508, 71885, 92797, 143770, 185594, 287540, 371188, 463985, 927970, 1020767, 1855940, 2041534, 4083068, 5103835, 10207670, 20415340]

約数ペア:

[(1, 20415340), (2, 10207670), (4, 5103835), (5, 4083068), (10, 2041534), (11, 1855940), (20, 1020767), (22, 927970), (44, 463985), (55, 371188), (71, 287540), (110, 185594), (142, 143770), (220, 92797), (284, 71885), (355, 57508), (710, 28754), (781, 26140), (1307, 15620), (1420, 14377), (1562, 13070), (2614, 7810), (3124, 6535), (3905, 5228)]