20915713

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{12097}}^1$

素因数の和:12136

約数の個数: 16

約数和(自身を含む): 27099520

約数和(自身を除く): 6183807

約数列:

[1, 7, 13, 19, 91, 133, 247, 1729, 12097, 84679, 157261, 229843, 1100827, 1608901, 2987959, 20915713]

約数ペア:

[(1, 20915713), (7, 2987959), (13, 1608901), (19, 1100827), (91, 229843), (133, 157261), (247, 84679), (1729, 12097)]