21685780

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{47143}}^1$

素因数の和:47175

約数の個数: 24

約数和(自身を含む): 47521152

約数和(自身を除く): 25835372

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 115, 230, 460, 47143, 94286, 188572, 235715, 471430, 942860, 1084289, 2168578, 4337156, 5421445, 10842890, 21685780]

約数ペア:

[(1, 21685780), (2, 10842890), (4, 5421445), (5, 4337156), (10, 2168578), (20, 1084289), (23, 942860), (46, 471430), (92, 235715), (115, 188572), (230, 94286), (460, 47143)]