21223540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{81629}}^1$

素因数の和:81651

約数の個数: 24

約数和(自身を含む): 47998440

約数和(自身を除く): 26774900

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 81629, 163258, 326516, 408145, 816290, 1061177, 1632580, 2122354, 4244708, 5305885, 10611770, 21223540]

約数ペア:

[(1, 21223540), (2, 10611770), (4, 5305885), (5, 4244708), (10, 2122354), (13, 1632580), (20, 1061177), (26, 816290), (52, 408145), (65, 326516), (130, 163258), (260, 81629)]