251679280

素因数分解:

$2^4\times 5^1\times {\mathrm{199}}^1\times {\mathrm{15809}}^1$

素因数の和:16021

約数の個数: 40

約数和(自身を含む): 588132000

約数和(自身を除く): 336452720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 199, 398, 796, 995, 1592, 1990, 3184, 3980, 7960, 15809, 15920, 31618, 63236, 79045, 126472, 158090, 252944, 316180, 632360, 1264720, 3145991, 6291982, 12583964, 15729955, 25167928, 31459910, 50335856, 62919820, 125839640, 251679280]

約数ペア:

[(1, 251679280), (2, 125839640), (4, 62919820), (5, 50335856), (8, 31459910), (10, 25167928), (16, 15729955), (20, 12583964), (40, 6291982), (80, 3145991), (199, 1264720), (398, 632360), (796, 316180), (995, 252944), (1592, 158090), (1990, 126472), (3184, 79045), (3980, 63236), (7960, 31618), (15809, 15920)]