19958468

素因数分解:

$2^2\times {\mathrm{61}}^1\times {\mathrm{157}}^1\times {\mathrm{521}}^1$

素因数の和:743

約数の個数: 24

約数和(自身を含む): 35794584

約数和(自身を除く): 15836116

約数列:

[1, 2, 4, 61, 122, 157, 244, 314, 521, 628, 1042, 2084, 9577, 19154, 31781, 38308, 63562, 81797, 127124, 163594, 327188, 4989617, 9979234, 19958468]

約数ペア:

[(1, 19958468), (2, 9979234), (4, 4989617), (61, 327188), (122, 163594), (157, 127124), (244, 81797), (314, 63562), (521, 38308), (628, 31781), (1042, 19154), (2084, 9577)]