21156080

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{829}}^1$

素因数の和:882

約数の個数: 80

約数和(自身を含む): 55576800

約数和(自身を除く): 34420720

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 29, 40, 44, 55, 58, 80, 88, 110, 116, 145, 176, 220, 232, 290, 319, 440, 464, 580, 638, 829, 880, 1160, 1276, 1595, 1658, 2320, 2552, 3190, 3316, 4145, 5104, 6380, 6632, 8290, 9119, 12760, 13264, 16580, 18238, 24041, 25520, 33160, 36476, 45595, 48082, 66320, 72952, 91190, 96164, 120205, 145904, 182380, 192328, 240410, 264451, 364760, 384656, 480820, 528902, 729520, 961640, 1057804, 1322255, 1923280, 2115608, 2644510, 4231216, 5289020, 10578040, 21156080]

約数ペア:

[(1, 21156080), (2, 10578040), (4, 5289020), (5, 4231216), (8, 2644510), (10, 2115608), (11, 1923280), (16, 1322255), (20, 1057804), (22, 961640), (29, 729520), (40, 528902), (44, 480820), (55, 384656), (58, 364760), (80, 264451), (88, 240410), (110, 192328), (116, 182380), (145, 145904), (176, 120205), (220, 96164), (232, 91190), (290, 72952), (319, 66320), (440, 48082), (464, 45595), (580, 36476), (638, 33160), (829, 25520), (880, 24041), (1160, 18238), (1276, 16580), (1595, 13264), (1658, 12760), (2320, 9119), (2552, 8290), (3190, 6632), (3316, 6380), (4145, 5104)]