21987009

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{11689}}^1$

素因数の和:11725

約数の個数: 24

約数和(自身を含む): 36472800

約数和(自身を除く): 14485791

約数列:

[1, 3, 9, 11, 19, 33, 57, 99, 171, 209, 627, 1881, 11689, 35067, 105201, 128579, 222091, 385737, 666273, 1157211, 1998819, 2443001, 7329003, 21987009]

約数ペア:

[(1, 21987009), (3, 7329003), (9, 2443001), (11, 1998819), (19, 1157211), (33, 666273), (57, 385737), (99, 222091), (171, 128579), (209, 105201), (627, 35067), (1881, 11689)]