20559428

素因数分解:

$2^2\times {\mathrm{73}}^1\times {\mathrm{181}}^1\times {\mathrm{389}}^1$

素因数の和:647

約数の個数: 24

約数和(自身を含む): 36767640

約数和(自身を除く): 16208212

約数列:

[1, 2, 4, 73, 146, 181, 292, 362, 389, 724, 778, 1556, 13213, 26426, 28397, 52852, 56794, 70409, 113588, 140818, 281636, 5139857, 10279714, 20559428]

約数ペア:

[(1, 20559428), (2, 10279714), (4, 5139857), (73, 281636), (146, 140818), (181, 113588), (292, 70409), (362, 56794), (389, 52852), (724, 28397), (778, 26426), (1556, 13213)]