19901371

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{1741}}^1$

素因数の和:1842

約数の個数: 16

約数和(自身を含む): 24081408

約数和(自身を除く): 4180037

約数列:

[1, 7, 23, 71, 161, 497, 1633, 1741, 11431, 12187, 40043, 123611, 280301, 865277, 2843053, 19901371]

約数ペア:

[(1, 19901371), (7, 2843053), (23, 865277), (71, 280301), (161, 123611), (497, 40043), (1633, 12187), (1741, 11431)]