21895517

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{107}}^1$

素因数の和:209

約数の個数: 32

約数和(自身を含む): 27869184

約数和(自身を除く): 5973667

約数列:

[1, 7, 23, 31, 41, 107, 161, 217, 287, 713, 749, 943, 1271, 2461, 3317, 4387, 4991, 6601, 8897, 17227, 23219, 29233, 30709, 76291, 100901, 135997, 204631, 534037, 706307, 951979, 3127931, 21895517]

約数ペア:

[(1, 21895517), (7, 3127931), (23, 951979), (31, 706307), (41, 534037), (107, 204631), (161, 135997), (217, 100901), (287, 76291), (713, 30709), (749, 29233), (943, 23219), (1271, 17227), (2461, 8897), (3317, 6601), (4387, 4991)]