20797745

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{109}}^1\times {\mathrm{1231}}^1$

素因数の和:1376

約数の個数: 16

約数和(自身を含む): 26019840

約数和(自身を除く): 5222095

約数列:

[1, 5, 31, 109, 155, 545, 1231, 3379, 6155, 16895, 38161, 134179, 190805, 670895, 4159549, 20797745]

約数ペア:

[(1, 20797745), (5, 4159549), (31, 670895), (109, 190805), (155, 134179), (545, 38161), (1231, 16895), (3379, 6155)]