21025215

素因数分解:

$3^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{9941}}^1$

素因数の和:9999

約数の個数: 24

約数和(自身を含む): 37222848

約数和(自身を除く): 16197633

約数列:

[1, 3, 5, 9, 15, 45, 47, 141, 235, 423, 705, 2115, 9941, 29823, 49705, 89469, 149115, 447345, 467227, 1401681, 2336135, 4205043, 7008405, 21025215]

約数ペア:

[(1, 21025215), (3, 7008405), (5, 4205043), (9, 2336135), (15, 1401681), (45, 467227), (47, 447345), (141, 149115), (235, 89469), (423, 49705), (705, 29823), (2115, 9941)]