215660

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{263}}^1$

素因数の和:313

約数の個数: 24

約数和(自身を含む): 465696

約数和(自身を除く): 250036

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 263, 410, 526, 820, 1052, 1315, 2630, 5260, 10783, 21566, 43132, 53915, 107830, 215660]

約数ペア:

[(1, 215660), (2, 107830), (4, 53915), (5, 43132), (10, 21566), (20, 10783), (41, 5260), (82, 2630), (164, 1315), (205, 1052), (263, 820), (410, 526)]