21782551

素因数分解:

$7^1\times {\mathrm{61}}^1\times {\mathrm{139}}^1\times {\mathrm{367}}^1$

素因数の和:574

約数の個数: 16

約数和(自身を含む): 25553920

約数和(自身を除く): 3771369

約数列:

[1, 7, 61, 139, 367, 427, 973, 2569, 8479, 22387, 51013, 59353, 156709, 357091, 3111793, 21782551]

約数ペア:

[(1, 21782551), (7, 3111793), (61, 357091), (139, 156709), (367, 59353), (427, 51013), (973, 22387), (2569, 8479)]