20504985

素因数分解:

$3^1\times 5^1\times {\mathrm{157}}^1\times {\mathrm{8707}}^1$

素因数の和:8872

約数の個数: 16

約数和(自身を含む): 33020736

約数和(自身を除く): 12515751

約数列:

[1, 3, 5, 15, 157, 471, 785, 2355, 8707, 26121, 43535, 130605, 1366999, 4100997, 6834995, 20504985]

約数ペア:

[(1, 20504985), (3, 6834995), (5, 4100997), (15, 1366999), (157, 130605), (471, 43535), (785, 26121), (2355, 8707)]