20162680

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{149}}^1\times {\mathrm{199}}^1$

素因数の和:376

約数の個数: 64

約数和(自身を含む): 48600000

約数和(自身を除く): 28437320

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 149, 170, 199, 298, 340, 398, 596, 680, 745, 796, 995, 1192, 1490, 1592, 1990, 2533, 2980, 3383, 3980, 5066, 5960, 6766, 7960, 10132, 12665, 13532, 16915, 20264, 25330, 27064, 29651, 33830, 50660, 59302, 67660, 101320, 118604, 135320, 148255, 237208, 296510, 504067, 593020, 1008134, 1186040, 2016268, 2520335, 4032536, 5040670, 10081340, 20162680]

約数ペア:

[(1, 20162680), (2, 10081340), (4, 5040670), (5, 4032536), (8, 2520335), (10, 2016268), (17, 1186040), (20, 1008134), (34, 593020), (40, 504067), (68, 296510), (85, 237208), (136, 148255), (149, 135320), (170, 118604), (199, 101320), (298, 67660), (340, 59302), (398, 50660), (596, 33830), (680, 29651), (745, 27064), (796, 25330), (995, 20264), (1192, 16915), (1490, 13532), (1592, 12665), (1990, 10132), (2533, 7960), (2980, 6766), (3383, 5960), (3980, 5066)]