21131816

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{155381}}^1$

素因数の和:155404

約数の個数: 16

約数和(自身を含む): 41953140

約数和(自身を除く): 20821324

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 155381, 310762, 621524, 1243048, 2641477, 5282954, 10565908, 21131816]

約数ペア:

[(1, 21131816), (2, 10565908), (4, 5282954), (8, 2641477), (17, 1243048), (34, 621524), (68, 310762), (136, 155381)]