7971990

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{20441}}^1$

素因数の和:20464

約数の個数: 32

約数和(自身を含む): 20605536

約数和(自身を除く): 12633546

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390, 20441, 40882, 61323, 102205, 122646, 204410, 265733, 306615, 531466, 613230, 797199, 1328665, 1594398, 2657330, 3985995, 7971990]

約数ペア:

[(1, 7971990), (2, 3985995), (3, 2657330), (5, 1594398), (6, 1328665), (10, 797199), (13, 613230), (15, 531466), (26, 306615), (30, 265733), (39, 204410), (65, 122646), (78, 102205), (130, 61323), (195, 40882), (390, 20441)]