21245745

素因数分解:

$3^1\times 5^1\times {\mathrm{823}}^1\times {\mathrm{1721}}^1$

素因数の和:2552

約数の個数: 16

約数和(自身を含む): 34054272

約数和(自身を除く): 12808527

約数列:

[1, 3, 5, 15, 823, 1721, 2469, 4115, 5163, 8605, 12345, 25815, 1416383, 4249149, 7081915, 21245745]

約数ペア:

[(1, 21245745), (3, 7081915), (5, 4249149), (15, 1416383), (823, 25815), (1721, 12345), (2469, 8605), (4115, 5163)]