21284540

素因数分解:

$2^2\times 5^1\times {\mathrm{163}}^1\times {\mathrm{6529}}^1$

素因数の和:6701

約数の個数: 24

約数和(自身を含む): 44978640

約数和(自身を除く): 23694100

約数列:

[1, 2, 4, 5, 10, 20, 163, 326, 652, 815, 1630, 3260, 6529, 13058, 26116, 32645, 65290, 130580, 1064227, 2128454, 4256908, 5321135, 10642270, 21284540]

約数ペア:

[(1, 21284540), (2, 10642270), (4, 5321135), (5, 4256908), (10, 2128454), (20, 1064227), (163, 130580), (326, 65290), (652, 32645), (815, 26116), (1630, 13058), (3260, 6529)]