21276320

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{193}}^1$

素因数の和:274

約数の個数: 96

約数和(自身を含む): 55438992

約数和(自身を除く): 34162672

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 53, 65, 80, 104, 106, 130, 160, 193, 208, 212, 260, 265, 386, 416, 424, 520, 530, 689, 772, 848, 965, 1040, 1060, 1378, 1544, 1696, 1930, 2080, 2120, 2509, 2756, 3088, 3445, 3860, 4240, 5018, 5512, 6176, 6890, 7720, 8480, 10036, 10229, 11024, 12545, 13780, 15440, 20072, 20458, 22048, 25090, 27560, 30880, 40144, 40916, 50180, 51145, 55120, 80288, 81832, 100360, 102290, 110240, 132977, 163664, 200720, 204580, 265954, 327328, 401440, 409160, 531908, 664885, 818320, 1063816, 1329770, 1636640, 2127632, 2659540, 4255264, 5319080, 10638160, 21276320]

約数ペア:

[(1, 21276320), (2, 10638160), (4, 5319080), (5, 4255264), (8, 2659540), (10, 2127632), (13, 1636640), (16, 1329770), (20, 1063816), (26, 818320), (32, 664885), (40, 531908), (52, 409160), (53, 401440), (65, 327328), (80, 265954), (104, 204580), (106, 200720), (130, 163664), (160, 132977), (193, 110240), (208, 102290), (212, 100360), (260, 81832), (265, 80288), (386, 55120), (416, 51145), (424, 50180), (520, 40916), (530, 40144), (689, 30880), (772, 27560), (848, 25090), (965, 22048), (1040, 20458), (1060, 20072), (1378, 15440), (1544, 13780), (1696, 12545), (1930, 11024), (2080, 10229), (2120, 10036), (2509, 8480), (2756, 7720), (3088, 6890), (3445, 6176), (3860, 5512), (4240, 5018)]