21743981

素因数分解:

$7^1\times {\mathrm{41}}^1\times {\mathrm{239}}^1\times {\mathrm{317}}^1$

素因数の和:604

約数の個数: 16

約数和(自身を含む): 25643520

約数和(自身を除く): 3899539

約数列:

[1, 7, 41, 239, 287, 317, 1673, 2219, 9799, 12997, 68593, 75763, 90979, 530341, 3106283, 21743981]

約数ペア:

[(1, 21743981), (7, 3106283), (41, 530341), (239, 90979), (287, 75763), (317, 68593), (1673, 12997), (2219, 9799)]