20984880

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{12491}}^1$

素因数の和:12514

約数の個数: 80

約数和(自身を含む): 74352384

約数和(自身を除く): 53367504

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 56, 60, 70, 80, 84, 105, 112, 120, 140, 168, 210, 240, 280, 336, 420, 560, 840, 1680, 12491, 24982, 37473, 49964, 62455, 74946, 87437, 99928, 124910, 149892, 174874, 187365, 199856, 249820, 262311, 299784, 349748, 374730, 437185, 499640, 524622, 599568, 699496, 749460, 874370, 999280, 1049244, 1311555, 1398992, 1498920, 1748740, 2098488, 2623110, 2997840, 3497480, 4196976, 5246220, 6994960, 10492440, 20984880]

約数ペア:

[(1, 20984880), (2, 10492440), (3, 6994960), (4, 5246220), (5, 4196976), (6, 3497480), (7, 2997840), (8, 2623110), (10, 2098488), (12, 1748740), (14, 1498920), (15, 1398992), (16, 1311555), (20, 1049244), (21, 999280), (24, 874370), (28, 749460), (30, 699496), (35, 599568), (40, 524622), (42, 499640), (48, 437185), (56, 374730), (60, 349748), (70, 299784), (80, 262311), (84, 249820), (105, 199856), (112, 187365), (120, 174874), (140, 149892), (168, 124910), (210, 99928), (240, 87437), (280, 74946), (336, 62455), (420, 49964), (560, 37473), (840, 24982), (1680, 12491)]