21721731

素因数分解:

$3^1\times {\mathrm{19}}^2\times {\mathrm{31}}^1\times {\mathrm{647}}^1$

素因数の和:719

約数の個数: 24

約数和(自身を含む): 31601664

約数和(自身を除く): 9879933

約数列:

[1, 3, 19, 31, 57, 93, 361, 589, 647, 1083, 1767, 1941, 11191, 12293, 20057, 33573, 36879, 60171, 233567, 381083, 700701, 1143249, 7240577, 21721731]

約数ペア:

[(1, 21721731), (3, 7240577), (19, 1143249), (31, 700701), (57, 381083), (93, 233567), (361, 60171), (589, 36879), (647, 33573), (1083, 20057), (1767, 12293), (1941, 11191)]