638421

素因数分解:

$3^1\times 7^2\times {\mathrm{43}}^1\times {\mathrm{101}}^1$

素因数の和:161

約数の個数: 24

約数和(自身を含む): 1023264

約数和(自身を除く): 384843

約数列:

[1, 3, 7, 21, 43, 49, 101, 129, 147, 301, 303, 707, 903, 2107, 2121, 4343, 4949, 6321, 13029, 14847, 30401, 91203, 212807, 638421]

約数ペア:

[(1, 638421), (3, 212807), (7, 91203), (21, 30401), (43, 14847), (49, 13029), (101, 6321), (129, 4949), (147, 4343), (301, 2121), (303, 2107), (707, 903)]