19997607

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{20261}}^1$

素因数の和:20318

約数の個数: 16

約数和(自身を含む): 31122432

約数和(自身を除く): 11124825

約数列:

[1, 3, 7, 21, 47, 141, 329, 987, 20261, 60783, 141827, 425481, 952267, 2856801, 6665869, 19997607]

約数ペア:

[(1, 19997607), (3, 6665869), (7, 2856801), (21, 952267), (47, 425481), (141, 141827), (329, 60783), (987, 20261)]