21980321

素因数分解:

${\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{251}}^1\times {\mathrm{419}}^1$

素因数の和:700

約数の個数: 16

約数和(自身を含む): 25401600

約数和(自身を除く): 3421279

約数列:

[1, 11, 19, 209, 251, 419, 2761, 4609, 4769, 7961, 52459, 87571, 105169, 1156859, 1998211, 21980321]

約数ペア:

[(1, 21980321), (11, 1998211), (19, 1156859), (209, 105169), (251, 87571), (419, 52459), (2761, 7961), (4609, 4769)]