20405138

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{557}}^1\times {\mathrm{1409}}^1$

素因数の和:1981

約数の個数: 16

約数和(自身を含む): 33044760

約数和(自身を除く): 12639622

約数列:

[1, 2, 13, 26, 557, 1114, 1409, 2818, 7241, 14482, 18317, 36634, 784813, 1569626, 10202569, 20405138]

約数ペア:

[(1, 20405138), (2, 10202569), (13, 1569626), (26, 784813), (557, 36634), (1114, 18317), (1409, 14482), (2818, 7241)]