21161515

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{5297}}^1$

素因数の和:5366

約数の個数: 16

約数和(自身を含む): 27464832

約数和(自身を除く): 6303317

約数列:

[1, 5, 17, 47, 85, 235, 799, 3995, 5297, 26485, 90049, 248959, 450245, 1244795, 4232303, 21161515]

約数ペア:

[(1, 21161515), (5, 4232303), (17, 1244795), (47, 450245), (85, 248959), (235, 90049), (799, 26485), (3995, 5297)]