20739355

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{2399}}^1$

素因数の和:2443

約数の個数: 32

約数和(自身を含む): 32256000

約数和(自身を除く): 11516645

約数列:

[1, 5, 7, 13, 19, 35, 65, 91, 95, 133, 247, 455, 665, 1235, 1729, 2399, 8645, 11995, 16793, 31187, 45581, 83965, 155935, 218309, 227905, 319067, 592553, 1091545, 1595335, 2962765, 4147871, 20739355]

約数ペア:

[(1, 20739355), (5, 4147871), (7, 2962765), (13, 1595335), (19, 1091545), (35, 592553), (65, 319067), (91, 227905), (95, 218309), (133, 155935), (247, 83965), (455, 45581), (665, 31187), (1235, 16793), (1729, 11995), (2399, 8645)]