21129777

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{73}}^1\times {\mathrm{1109}}^1$

素因数の和:1217

約数の個数: 24

約数和(自身を含む): 32034600

約数和(自身を除く): 10904823

約数列:

[1, 3, 9, 29, 73, 87, 219, 261, 657, 1109, 2117, 3327, 6351, 9981, 19053, 32161, 80957, 96483, 242871, 289449, 728613, 2347753, 7043259, 21129777]

約数ペア:

[(1, 21129777), (3, 7043259), (9, 2347753), (29, 728613), (73, 289449), (87, 242871), (219, 96483), (261, 80957), (657, 32161), (1109, 19053), (2117, 9981), (3327, 6351)]