21671912

素因数分解:

$2^3\times {\mathrm{53}}^1\times {\mathrm{79}}^1\times {\mathrm{647}}^1$

素因数の和:785

約数の個数: 32

約数和(自身を含む): 41990400

約数和(自身を除く): 20318488

約数列:

[1, 2, 4, 8, 53, 79, 106, 158, 212, 316, 424, 632, 647, 1294, 2588, 4187, 5176, 8374, 16748, 33496, 34291, 51113, 68582, 102226, 137164, 204452, 274328, 408904, 2708989, 5417978, 10835956, 21671912]

約数ペア:

[(1, 21671912), (2, 10835956), (4, 5417978), (8, 2708989), (53, 408904), (79, 274328), (106, 204452), (158, 137164), (212, 102226), (316, 68582), (424, 51113), (632, 34291), (647, 33496), (1294, 16748), (2588, 8374), (4187, 5176)]