20470480

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{79}}^2$

素因数の和:212

約数の個数: 60

約数和(自身を含む): 49379652

約数和(自身を除く): 28909172

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 79, 80, 82, 158, 164, 205, 316, 328, 395, 410, 632, 656, 790, 820, 1264, 1580, 1640, 3160, 3239, 3280, 6241, 6320, 6478, 12482, 12956, 16195, 24964, 25912, 31205, 32390, 49928, 51824, 62410, 64780, 99856, 124820, 129560, 249640, 255881, 259120, 499280, 511762, 1023524, 1279405, 2047048, 2558810, 4094096, 5117620, 10235240, 20470480]

約数ペア:

[(1, 20470480), (2, 10235240), (4, 5117620), (5, 4094096), (8, 2558810), (10, 2047048), (16, 1279405), (20, 1023524), (40, 511762), (41, 499280), (79, 259120), (80, 255881), (82, 249640), (158, 129560), (164, 124820), (205, 99856), (316, 64780), (328, 62410), (395, 51824), (410, 49928), (632, 32390), (656, 31205), (790, 25912), (820, 24964), (1264, 16195), (1580, 12956), (1640, 12482), (3160, 6478), (3239, 6320), (3280, 6241)]