21286940

素因数分解:

$2^2\times 5^1\times {\mathrm{113}}^1\times {\mathrm{9419}}^1$

素因数の和:9541

約数の個数: 24

約数和(自身を含む): 45102960

約数和(自身を除く): 23816020

約数列:

[1, 2, 4, 5, 10, 20, 113, 226, 452, 565, 1130, 2260, 9419, 18838, 37676, 47095, 94190, 188380, 1064347, 2128694, 4257388, 5321735, 10643470, 21286940]

約数ペア:

[(1, 21286940), (2, 10643470), (4, 5321735), (5, 4257388), (10, 2128694), (20, 1064347), (113, 188380), (226, 94190), (452, 47095), (565, 37676), (1130, 18838), (2260, 9419)]