21388575

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{21937}}^1$

素因数の和:21963

約数の個数: 24

約数和(自身を含む): 38084368

約数和(自身を除く): 16695793

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 195, 325, 975, 21937, 65811, 109685, 285181, 329055, 548425, 855543, 1425905, 1645275, 4277715, 7129525, 21388575]

約数ペア:

[(1, 21388575), (3, 7129525), (5, 4277715), (13, 1645275), (15, 1425905), (25, 855543), (39, 548425), (65, 329055), (75, 285181), (195, 109685), (325, 65811), (975, 21937)]