28247440

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{173}}^1$

素因数の和:356

約数の個数: 80

約数和(自身を含む): 71589168

約数和(自身を除く): 43341728

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 157, 173, 208, 260, 314, 346, 520, 628, 692, 785, 865, 1040, 1256, 1384, 1570, 1730, 2041, 2249, 2512, 2768, 3140, 3460, 4082, 4498, 6280, 6920, 8164, 8996, 10205, 11245, 12560, 13840, 16328, 17992, 20410, 22490, 27161, 32656, 35984, 40820, 44980, 54322, 81640, 89960, 108644, 135805, 163280, 179920, 217288, 271610, 353093, 434576, 543220, 706186, 1086440, 1412372, 1765465, 2172880, 2824744, 3530930, 5649488, 7061860, 14123720, 28247440]

約数ペア:

[(1, 28247440), (2, 14123720), (4, 7061860), (5, 5649488), (8, 3530930), (10, 2824744), (13, 2172880), (16, 1765465), (20, 1412372), (26, 1086440), (40, 706186), (52, 543220), (65, 434576), (80, 353093), (104, 271610), (130, 217288), (157, 179920), (173, 163280), (208, 135805), (260, 108644), (314, 89960), (346, 81640), (520, 54322), (628, 44980), (692, 40820), (785, 35984), (865, 32656), (1040, 27161), (1256, 22490), (1384, 20410), (1570, 17992), (1730, 16328), (2041, 13840), (2249, 12560), (2512, 11245), (2768, 10205), (3140, 8996), (3460, 8164), (4082, 6920), (4498, 6280)]