21234815

素因数分解:

$5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{20921}}^1$

素因数の和:20962

約数の個数: 16

約数和(自身を含む): 30127680

約数和(自身を除く): 8892865

約数列:

[1, 5, 7, 29, 35, 145, 203, 1015, 20921, 104605, 146447, 606709, 732235, 3033545, 4246963, 21234815]

約数ペア:

[(1, 21234815), (5, 4246963), (7, 3033545), (29, 732235), (35, 606709), (145, 146447), (203, 104605), (1015, 20921)]