21421815

素因数分解:

$3^1\times 5^1\times {\mathrm{269}}^1\times {\mathrm{5309}}^1$

素因数の和:5586

約数の個数: 16

約数和(自身を含む): 34408800

約数和(自身を除く): 12986985

約数列:

[1, 3, 5, 15, 269, 807, 1345, 4035, 5309, 15927, 26545, 79635, 1428121, 4284363, 7140605, 21421815]

約数ペア:

[(1, 21421815), (3, 7140605), (5, 4284363), (15, 1428121), (269, 79635), (807, 26545), (1345, 15927), (4035, 5309)]