21264675

素因数分解:

$3^1\times 5^2\times {\mathrm{281}}^1\times {\mathrm{1009}}^1$

素因数の和:1303

約数の個数: 24

約数和(自身を含む): 35317680

約数和(自身を除く): 14053005

約数列:

[1, 3, 5, 15, 25, 75, 281, 843, 1009, 1405, 3027, 4215, 5045, 7025, 15135, 21075, 25225, 75675, 283529, 850587, 1417645, 4252935, 7088225, 21264675]

約数ペア:

[(1, 21264675), (3, 7088225), (5, 4252935), (15, 1417645), (25, 850587), (75, 283529), (281, 75675), (843, 25225), (1009, 21075), (1405, 15135), (3027, 7025), (4215, 5045)]