21294495

素因数分解:

$3^4\times 5^1\times {\mathrm{52579}}^1$

素因数の和:52596

約数の個数: 20

約数和(自身を含む): 38173080

約数和(自身を除く): 16878585

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 52579, 157737, 262895, 473211, 788685, 1419633, 2366055, 4258899, 7098165, 21294495]

約数ペア:

[(1, 21294495), (3, 7098165), (5, 4258899), (9, 2366055), (15, 1419633), (27, 788685), (45, 473211), (81, 262895), (135, 157737), (405, 52579)]