20998448

素因数分解:

$2^4\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{1327}}^1$

素因数の和:1401

約数の個数: 40

約数和(自身を含む): 43473408

約数和(自身を除く): 22474960

約数列:

[1, 2, 4, 8, 16, 23, 43, 46, 86, 92, 172, 184, 344, 368, 688, 989, 1327, 1978, 2654, 3956, 5308, 7912, 10616, 15824, 21232, 30521, 57061, 61042, 114122, 122084, 228244, 244168, 456488, 488336, 912976, 1312403, 2624806, 5249612, 10499224, 20998448]

約数ペア:

[(1, 20998448), (2, 10499224), (4, 5249612), (8, 2624806), (16, 1312403), (23, 912976), (43, 488336), (46, 456488), (86, 244168), (92, 228244), (172, 122084), (184, 114122), (344, 61042), (368, 57061), (688, 30521), (989, 21232), (1327, 15824), (1978, 10616), (2654, 7912), (3956, 5308)]