20418656

素因数分解:

$2^5\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{197}}^1$

素因数の和:327

約数の個数: 48

約数和(自身を含む): 41912640

約数和(自身を除く): 21493984

約数列:

[1, 2, 4, 8, 16, 32, 41, 79, 82, 158, 164, 197, 316, 328, 394, 632, 656, 788, 1264, 1312, 1576, 2528, 3152, 3239, 6304, 6478, 8077, 12956, 15563, 16154, 25912, 31126, 32308, 51824, 62252, 64616, 103648, 124504, 129232, 249008, 258464, 498016, 638083, 1276166, 2552332, 5104664, 10209328, 20418656]

約数ペア:

[(1, 20418656), (2, 10209328), (4, 5104664), (8, 2552332), (16, 1276166), (32, 638083), (41, 498016), (79, 258464), (82, 249008), (158, 129232), (164, 124504), (197, 103648), (316, 64616), (328, 62252), (394, 51824), (632, 32308), (656, 31126), (788, 25912), (1264, 16154), (1312, 15563), (1576, 12956), (2528, 8077), (3152, 6478), (3239, 6304)]