28940720

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{179}}^1$

素因数の和:282

約数の個数: 80

約数和(自身を含む): 70709760

約数和(自身を除く): 41769040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 47, 80, 86, 94, 172, 179, 188, 215, 235, 344, 358, 376, 430, 470, 688, 716, 752, 860, 895, 940, 1432, 1720, 1790, 1880, 2021, 2864, 3440, 3580, 3760, 4042, 7160, 7697, 8084, 8413, 10105, 14320, 15394, 16168, 16826, 20210, 30788, 32336, 33652, 38485, 40420, 42065, 61576, 67304, 76970, 80840, 84130, 123152, 134608, 153940, 161680, 168260, 307880, 336520, 361759, 615760, 673040, 723518, 1447036, 1808795, 2894072, 3617590, 5788144, 7235180, 14470360, 28940720]

約数ペア:

[(1, 28940720), (2, 14470360), (4, 7235180), (5, 5788144), (8, 3617590), (10, 2894072), (16, 1808795), (20, 1447036), (40, 723518), (43, 673040), (47, 615760), (80, 361759), (86, 336520), (94, 307880), (172, 168260), (179, 161680), (188, 153940), (215, 134608), (235, 123152), (344, 84130), (358, 80840), (376, 76970), (430, 67304), (470, 61576), (688, 42065), (716, 40420), (752, 38485), (860, 33652), (895, 32336), (940, 30788), (1432, 20210), (1720, 16826), (1790, 16168), (1880, 15394), (2021, 14320), (2864, 10105), (3440, 8413), (3580, 8084), (3760, 7697), (4042, 7160)]