21508215

素因数分解:

$3^1\times 5^1\times {\mathrm{157}}^1\times {\mathrm{9133}}^1$

素因数の和:9298

約数の個数: 16

約数和(自身を含む): 34636128

約数和(自身を除く): 13127913

約数列:

[1, 3, 5, 15, 157, 471, 785, 2355, 9133, 27399, 45665, 136995, 1433881, 4301643, 7169405, 21508215]

約数ペア:

[(1, 21508215), (3, 7169405), (5, 4301643), (15, 1433881), (157, 136995), (471, 45665), (785, 27399), (2355, 9133)]