221465320

素因数分解:

$2^3\times 5^1\times {\mathrm{409}}^1\times {\mathrm{13537}}^1$

素因数の和:13957

約数の個数: 32

約数和(自身を含む): 499552200

約数和(自身を除く): 278086880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 409, 818, 1636, 2045, 3272, 4090, 8180, 13537, 16360, 27074, 54148, 67685, 108296, 135370, 270740, 541480, 5536633, 11073266, 22146532, 27683165, 44293064, 55366330, 110732660, 221465320]

約数ペア:

[(1, 221465320), (2, 110732660), (4, 55366330), (5, 44293064), (8, 27683165), (10, 22146532), (20, 11073266), (40, 5536633), (409, 541480), (818, 270740), (1636, 135370), (2045, 108296), (3272, 67685), (4090, 54148), (8180, 27074), (13537, 16360)]