21960379

素因数分解:

$7^2\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{643}}^1$

素因数の和:715

約数の個数: 24

約数和(自身を含む): 27751248

約数和(自身を除く): 5790869

約数列:

[1, 7, 17, 41, 49, 119, 287, 643, 697, 833, 2009, 4501, 4879, 10931, 26363, 31507, 34153, 76517, 184541, 448171, 535619, 1291787, 3137197, 21960379]

約数ペア:

[(1, 21960379), (7, 3137197), (17, 1291787), (41, 535619), (49, 448171), (119, 184541), (287, 76517), (643, 34153), (697, 31507), (833, 26363), (2009, 10931), (4501, 4879)]