21219879

素因数分解:

$3^1\times {\mathrm{139}}^1\times {\mathrm{151}}^1\times {\mathrm{337}}^1$

素因数の和:630

約数の個数: 16

約数和(自身を含む): 28770560

約数和(自身を除く): 7550681

約数列:

[1, 3, 139, 151, 337, 417, 453, 1011, 20989, 46843, 50887, 62967, 140529, 152661, 7073293, 21219879]

約数ペア:

[(1, 21219879), (3, 7073293), (139, 152661), (151, 140529), (337, 62967), (417, 50887), (453, 46843), (1011, 20989)]