20721883

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{3733}}^1$

素因数の和:3814

約数の個数: 16

約数和(自身を含む): 25928896

約数和(自身を除く): 5207013

約数列:

[1, 7, 13, 61, 91, 427, 793, 3733, 5551, 26131, 48529, 227713, 339703, 1593991, 2960269, 20721883]

約数ペア:

[(1, 20721883), (7, 2960269), (13, 1593991), (61, 339703), (91, 227713), (427, 48529), (793, 26131), (3733, 5551)]