20721183

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{42901}}^1$

素因数の和:42934

約数の個数: 16

約数和(自身を含む): 32948736

約数和(自身を除く): 12227553

約数列:

[1, 3, 7, 21, 23, 69, 161, 483, 42901, 128703, 300307, 900921, 986723, 2960169, 6907061, 20721183]

約数ペア:

[(1, 20721183), (3, 6907061), (7, 2960169), (21, 986723), (23, 900921), (69, 300307), (161, 128703), (483, 42901)]