21290555

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{2707}}^1$

素因数の和:2747

約数の個数: 24

約数和(自身を含む): 30253776

約数和(自身を除く): 8963221

約数列:

[1, 5, 11, 13, 55, 65, 121, 143, 605, 715, 1573, 2707, 7865, 13535, 29777, 35191, 148885, 175955, 327547, 387101, 1637735, 1935505, 4258111, 21290555]

約数ペア:

[(1, 21290555), (5, 4258111), (11, 1935505), (13, 1637735), (55, 387101), (65, 327547), (121, 175955), (143, 148885), (605, 35191), (715, 29777), (1573, 13535), (2707, 7865)]