21915771

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{223}}^1$

素因数の和:331

約数の個数: 32

約数和(自身を含む): 32514048

約数和(自身を除く): 10598277

約数列:

[1, 3, 17, 41, 47, 51, 123, 141, 223, 669, 697, 799, 1927, 2091, 2397, 3791, 5781, 9143, 10481, 11373, 27429, 31443, 32759, 98277, 155431, 178177, 429721, 466293, 534531, 1289163, 7305257, 21915771]

約数ペア:

[(1, 21915771), (3, 7305257), (17, 1289163), (41, 534531), (47, 466293), (51, 429721), (123, 178177), (141, 155431), (223, 98277), (669, 32759), (697, 31443), (799, 27429), (1927, 11373), (2091, 10481), (2397, 9143), (3791, 5781)]