21397015

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{4327}}^1$

素因数の和:4398

約数の個数: 16

約数和(自身を含む): 27422208

約数和(自身を除く): 6025193

約数列:

[1, 5, 23, 43, 115, 215, 989, 4327, 4945, 21635, 99521, 186061, 497605, 930305, 4279403, 21397015]

約数ペア:

[(1, 21397015), (5, 4279403), (23, 930305), (43, 497605), (115, 186061), (215, 99521), (989, 21635), (4327, 4945)]