21115275

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{16561}}^1$

素因数の和:16591

約数の個数: 24

約数和(自身を含む): 36966384

約数和(自身を除く): 15851109

約数列:

[1, 3, 5, 15, 17, 25, 51, 75, 85, 255, 425, 1275, 16561, 49683, 82805, 248415, 281537, 414025, 844611, 1242075, 1407685, 4223055, 7038425, 21115275]

約数ペア:

[(1, 21115275), (3, 7038425), (5, 4223055), (15, 1407685), (17, 1242075), (25, 844611), (51, 414025), (75, 281537), (85, 248415), (255, 82805), (425, 49683), (1275, 16561)]