20538815

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{163}}^1$

素因数の和:287

約数の個数: 32

約数和(自身を含む): 28339200

約数和(自身を除く): 7800385

約数列:

[1, 5, 11, 29, 55, 79, 145, 163, 319, 395, 815, 869, 1595, 1793, 2291, 4345, 4727, 8965, 11455, 12877, 23635, 25201, 51997, 64385, 126005, 141647, 259985, 373433, 708235, 1867165, 4107763, 20538815]

約数ペア:

[(1, 20538815), (5, 4107763), (11, 1867165), (29, 708235), (55, 373433), (79, 259985), (145, 141647), (163, 126005), (319, 64385), (395, 51997), (815, 25201), (869, 23635), (1595, 12877), (1793, 11455), (2291, 8965), (4345, 4727)]