21440260

素因数分解:

$2^2\times 5^1\times {\mathrm{199}}^1\times {\mathrm{5387}}^1$

素因数の和:5595

約数の個数: 24

約数和(自身を含む): 45259200

約数和(自身を除く): 23818940

約数列:

[1, 2, 4, 5, 10, 20, 199, 398, 796, 995, 1990, 3980, 5387, 10774, 21548, 26935, 53870, 107740, 1072013, 2144026, 4288052, 5360065, 10720130, 21440260]

約数ペア:

[(1, 21440260), (2, 10720130), (4, 5360065), (5, 4288052), (10, 2144026), (20, 1072013), (199, 107740), (398, 53870), (796, 26935), (995, 21548), (1990, 10774), (3980, 5387)]