638863731

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{317}}^1\times {\mathrm{20357}}^1$

素因数の和:20691

約数の個数: 24

約数和(自身を含む): 1009919664

約数和(自身を除く): 371055933

約数列:

[1, 3, 9, 11, 33, 99, 317, 951, 2853, 3487, 10461, 20357, 31383, 61071, 183213, 223927, 671781, 2015343, 6453169, 19359507, 58078521, 70984859, 212954577, 638863731]

約数ペア:

[(1, 638863731), (3, 212954577), (9, 70984859), (11, 58078521), (33, 19359507), (99, 6453169), (317, 2015343), (951, 671781), (2853, 223927), (3487, 183213), (10461, 61071), (20357, 31383)]