18813460

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{163}}^1\times {\mathrm{199}}^1$

素因数の和:400

約数の個数: 48

約数和(自身を含む): 41328000

約数和(自身を除く): 22514540

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 163, 199, 290, 326, 398, 580, 652, 796, 815, 995, 1630, 1990, 3260, 3980, 4727, 5771, 9454, 11542, 18908, 23084, 23635, 28855, 32437, 47270, 57710, 64874, 94540, 115420, 129748, 162185, 324370, 648740, 940673, 1881346, 3762692, 4703365, 9406730, 18813460]

約数ペア:

[(1, 18813460), (2, 9406730), (4, 4703365), (5, 3762692), (10, 1881346), (20, 940673), (29, 648740), (58, 324370), (116, 162185), (145, 129748), (163, 115420), (199, 94540), (290, 64874), (326, 57710), (398, 47270), (580, 32437), (652, 28855), (796, 23635), (815, 23084), (995, 18908), (1630, 11542), (1990, 9454), (3260, 5771), (3980, 4727)]