21538445

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{1669}}^1$

素因数の和:1792

約数の個数: 16

約数和(自身を含む): 27054000

約数和(自身を除く): 5515555

約数列:

[1, 5, 29, 89, 145, 445, 1669, 2581, 8345, 12905, 48401, 148541, 242005, 742705, 4307689, 21538445]

約数ペア:

[(1, 21538445), (5, 4307689), (29, 742705), (89, 242005), (145, 148541), (445, 48401), (1669, 12905), (2581, 8345)]