21081891

素因数分解:

$3^1\times {\mathrm{31}}^1\times {\mathrm{397}}^1\times {\mathrm{571}}^1$

素因数の和:1002

約数の個数: 16

約数和(自身を含む): 29139968

約数和(自身を除く): 8058077

約数列:

[1, 3, 31, 93, 397, 571, 1191, 1713, 12307, 17701, 36921, 53103, 226687, 680061, 7027297, 21081891]

約数ペア:

[(1, 21081891), (3, 7027297), (31, 680061), (93, 226687), (397, 53103), (571, 36921), (1191, 17701), (1713, 12307)]