51520021

素因数分解:

$7^2\times {\mathrm{37}}^1\times {\mathrm{157}}^1\times {\mathrm{181}}^1$

素因数の和:389

約数の個数: 24

約数和(自身を含む): 62285496

約数和(自身を除く): 10765475

約数列:

[1, 7, 37, 49, 157, 181, 259, 1099, 1267, 1813, 5809, 6697, 7693, 8869, 28417, 40663, 46879, 198919, 284641, 328153, 1051429, 1392433, 7360003, 51520021]

約数ペア:

[(1, 51520021), (7, 7360003), (37, 1392433), (49, 1051429), (157, 328153), (181, 284641), (259, 198919), (1099, 46879), (1267, 40663), (1813, 28417), (5809, 8869), (6697, 7693)]