21455553

素因数分解:

$3^1\times 7^1\times {\mathrm{149}}^1\times {\mathrm{6857}}^1$

素因数の和:7016

約数の個数: 16

約数和(自身を含む): 32918400

約数和(自身を除く): 11462847

約数列:

[1, 3, 7, 21, 149, 447, 1043, 3129, 6857, 20571, 47999, 143997, 1021693, 3065079, 7151851, 21455553]

約数ペア:

[(1, 21455553), (3, 7151851), (7, 3065079), (21, 1021693), (149, 143997), (447, 47999), (1043, 20571), (3129, 6857)]