21272315

素因数分解:

$5^1\times {\mathrm{43}}^1\times {\mathrm{163}}^1\times {\mathrm{607}}^1$

素因数の和:818

約数の個数: 16

約数和(自身を含む): 26323968

約数和(自身を除く): 5051653

約数列:

[1, 5, 43, 163, 215, 607, 815, 3035, 7009, 26101, 35045, 98941, 130505, 494705, 4254463, 21272315]

約数ペア:

[(1, 21272315), (5, 4254463), (43, 494705), (163, 130505), (215, 98941), (607, 35045), (815, 26101), (3035, 7009)]