28212990

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{72341}}^1$

素因数の和:72364

約数の個数: 32

約数和(自身を含む): 72920736

約数和(自身を除く): 44707746

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390, 72341, 144682, 217023, 361705, 434046, 723410, 940433, 1085115, 1880866, 2170230, 2821299, 4702165, 5642598, 9404330, 14106495, 28212990]

約数ペア:

[(1, 28212990), (2, 14106495), (3, 9404330), (5, 5642598), (6, 4702165), (10, 2821299), (13, 2170230), (15, 1880866), (26, 1085115), (30, 940433), (39, 723410), (65, 434046), (78, 361705), (130, 217023), (195, 144682), (390, 72341)]