1990457960

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{1157243}}^1$

素因数の和:1157297

約数の個数: 32

約数和(自身を含む): 4582686240

約数和(自身を除く): 2592228280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 1157243, 2314486, 4628972, 5786215, 9257944, 11572430, 23144860, 46289720, 49761449, 99522898, 199045796, 248807245, 398091592, 497614490, 995228980, 1990457960]

約数ペア:

[(1, 1990457960), (2, 995228980), (4, 497614490), (5, 398091592), (8, 248807245), (10, 199045796), (20, 99522898), (40, 49761449), (43, 46289720), (86, 23144860), (172, 11572430), (215, 9257944), (344, 5786215), (430, 4628972), (860, 2314486), (1720, 1157243)]