18715991

素因数分解:

$7^2\times {\mathrm{29}}^1\times {\mathrm{13171}}^1$

素因数の和:13214

約数の個数: 12

約数和(自身を含む): 22524120

約数和(自身を除く): 3808129

約数列:

[1, 7, 29, 49, 203, 1421, 13171, 92197, 381959, 645379, 2673713, 18715991]

約数ペア:

[(1, 18715991), (7, 2673713), (29, 645379), (49, 381959), (203, 92197), (1421, 13171)]