20577040

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{349}}^1$

素因数の和:440

約数の個数: 80

約数和(自身を含む): 53121600

約数和(自身を除く): 32544560

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 67, 80, 88, 110, 134, 176, 220, 268, 335, 349, 440, 536, 670, 698, 737, 880, 1072, 1340, 1396, 1474, 1745, 2680, 2792, 2948, 3490, 3685, 3839, 5360, 5584, 5896, 6980, 7370, 7678, 11792, 13960, 14740, 15356, 19195, 23383, 27920, 29480, 30712, 38390, 46766, 58960, 61424, 76780, 93532, 116915, 153560, 187064, 233830, 257213, 307120, 374128, 467660, 514426, 935320, 1028852, 1286065, 1870640, 2057704, 2572130, 4115408, 5144260, 10288520, 20577040]

約数ペア:

[(1, 20577040), (2, 10288520), (4, 5144260), (5, 4115408), (8, 2572130), (10, 2057704), (11, 1870640), (16, 1286065), (20, 1028852), (22, 935320), (40, 514426), (44, 467660), (55, 374128), (67, 307120), (80, 257213), (88, 233830), (110, 187064), (134, 153560), (176, 116915), (220, 93532), (268, 76780), (335, 61424), (349, 58960), (440, 46766), (536, 38390), (670, 30712), (698, 29480), (737, 27920), (880, 23383), (1072, 19195), (1340, 15356), (1396, 14740), (1474, 13960), (1745, 11792), (2680, 7678), (2792, 7370), (2948, 6980), (3490, 5896), (3685, 5584), (3839, 5360)]