21282020

素因数分解:

$2^2\times 5^1\times {\mathrm{349}}^1\times {\mathrm{3049}}^1$

素因数の和:3407

約数の個数: 24

約数和(自身を含む): 44835000

約数和(自身を除く): 23552980

約数列:

[1, 2, 4, 5, 10, 20, 349, 698, 1396, 1745, 3049, 3490, 6098, 6980, 12196, 15245, 30490, 60980, 1064101, 2128202, 4256404, 5320505, 10641010, 21282020]

約数ペア:

[(1, 21282020), (2, 10641010), (4, 5320505), (5, 4256404), (10, 2128202), (20, 1064101), (349, 60980), (698, 30490), (1396, 15245), (1745, 12196), (3049, 6980), (3490, 6098)]