19517920

素因数分解:

$2^5\times 5^1\times {\mathrm{199}}^1\times {\mathrm{613}}^1$

素因数の和:827

約数の個数: 48

約数和(自身を含む): 46418400

約数和(自身を除く): 26900480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 199, 398, 613, 796, 995, 1226, 1592, 1990, 2452, 3065, 3184, 3980, 4904, 6130, 6368, 7960, 9808, 12260, 15920, 19616, 24520, 31840, 49040, 98080, 121987, 243974, 487948, 609935, 975896, 1219870, 1951792, 2439740, 3903584, 4879480, 9758960, 19517920]

約数ペア:

[(1, 19517920), (2, 9758960), (4, 4879480), (5, 3903584), (8, 2439740), (10, 1951792), (16, 1219870), (20, 975896), (32, 609935), (40, 487948), (80, 243974), (160, 121987), (199, 98080), (398, 49040), (613, 31840), (796, 24520), (995, 19616), (1226, 15920), (1592, 12260), (1990, 9808), (2452, 7960), (3065, 6368), (3184, 6130), (3980, 4904)]