20557509

素因数分解:

$3^1\times 7^2\times {\mathrm{109}}^1\times {\mathrm{1283}}^1$

素因数の和:1409

約数の個数: 24

約数和(自身を含む): 32202720

約数和(自身を除く): 11645211

約数列:

[1, 3, 7, 21, 49, 109, 147, 327, 763, 1283, 2289, 3849, 5341, 8981, 16023, 26943, 62867, 139847, 188601, 419541, 978929, 2936787, 6852503, 20557509]

約数ペア:

[(1, 20557509), (3, 6852503), (7, 2936787), (21, 978929), (49, 419541), (109, 188601), (147, 139847), (327, 62867), (763, 26943), (1283, 16023), (2289, 8981), (3849, 5341)]