19963760

素因数分解:

$2^4\times 5^1\times {\mathrm{257}}^1\times {\mathrm{971}}^1$

素因数の和:1241

約数の個数: 40

約数和(自身を含む): 46644336

約数和(自身を除く): 26680576

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 257, 514, 971, 1028, 1285, 1942, 2056, 2570, 3884, 4112, 4855, 5140, 7768, 9710, 10280, 15536, 19420, 20560, 38840, 77680, 249547, 499094, 998188, 1247735, 1996376, 2495470, 3992752, 4990940, 9981880, 19963760]

約数ペア:

[(1, 19963760), (2, 9981880), (4, 4990940), (5, 3992752), (8, 2495470), (10, 1996376), (16, 1247735), (20, 998188), (40, 499094), (80, 249547), (257, 77680), (514, 38840), (971, 20560), (1028, 19420), (1285, 15536), (1942, 10280), (2056, 9710), (2570, 7768), (3884, 5140), (4112, 4855)]