19995577

素因数分解:

$7^2\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{269}}^1$

素因数の和:361

約数の個数: 24

約数和(自身を含む): 24562440

約数和(自身を除く): 4566863

約数列:

[1, 7, 37, 41, 49, 259, 269, 287, 1517, 1813, 1883, 2009, 9953, 10619, 11029, 13181, 69671, 74333, 77203, 408073, 487697, 540421, 2856511, 19995577]

約数ペア:

[(1, 19995577), (7, 2856511), (37, 540421), (41, 487697), (49, 408073), (259, 77203), (269, 74333), (287, 69671), (1517, 13181), (1813, 11029), (1883, 10619), (2009, 9953)]