31912101

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{20981}}^1$

素因数の和:21013

約数の個数: 18

約数和(自身を含む): 49916178

約数和(自身を除く): 18004077

約数列:

[1, 3, 9, 13, 39, 117, 169, 507, 1521, 20981, 62943, 188829, 272753, 818259, 2454777, 3545789, 10637367, 31912101]

約数ペア:

[(1, 31912101), (3, 10637367), (9, 3545789), (13, 2454777), (39, 818259), (117, 272753), (169, 188829), (507, 62943), (1521, 20981)]