21620885

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{2749}}^1$

素因数の和:2789

約数の個数: 24

約数和(自身を含む): 30723000

約数和(自身を除く): 9102115

約数列:

[1, 5, 11, 13, 55, 65, 121, 143, 605, 715, 1573, 2749, 7865, 13745, 30239, 35737, 151195, 178685, 332629, 393107, 1663145, 1965535, 4324177, 21620885]

約数ペア:

[(1, 21620885), (5, 4324177), (11, 1965535), (13, 1663145), (55, 393107), (65, 332629), (121, 178685), (143, 151195), (605, 35737), (715, 30239), (1573, 13745), (2749, 7865)]