21021705

素因数分解:

$3^2\times 5^1\times {\mathrm{569}}^1\times {\mathrm{821}}^1$

素因数の和:1401

約数の個数: 24

約数和(自身を含む): 36546120

約数和(自身を除く): 15524415

約数列:

[1, 3, 5, 9, 15, 45, 569, 821, 1707, 2463, 2845, 4105, 5121, 7389, 8535, 12315, 25605, 36945, 467149, 1401447, 2335745, 4204341, 7007235, 21021705]

約数ペア:

[(1, 21021705), (3, 7007235), (5, 4204341), (9, 2335745), (15, 1401447), (45, 467149), (569, 36945), (821, 25605), (1707, 12315), (2463, 8535), (2845, 7389), (4105, 5121)]