21291219124

素因数分解:

$2^2\times 7^2\times {\mathrm{229}}^1\times {\mathrm{523}}^1\times {\mathrm{907}}^1$

素因数の和:1677

約数の個数: 72

約数和(自身を含む): 43663431840

約数和(自身を除く): 22372212716

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 229, 458, 523, 907, 916, 1046, 1603, 1814, 2092, 3206, 3628, 3661, 6349, 6412, 7322, 11221, 12698, 14644, 22442, 25396, 25627, 44443, 44884, 51254, 88886, 102508, 119767, 177772, 207703, 239534, 415406, 474361, 479068, 830812, 838369, 948722, 1453921, 1676738, 1897444, 2907842, 3320527, 3353476, 5815684, 5868583, 6641054, 10177447, 11737166, 13282108, 20354894, 23243689, 23474332, 40709788, 46487378, 92974756, 108628669, 217257338, 434514676, 760400683, 1520801366, 3041602732, 5322804781, 10645609562, 21291219124]

約数ペア:

[(1, 21291219124), (2, 10645609562), (4, 5322804781), (7, 3041602732), (14, 1520801366), (28, 760400683), (49, 434514676), (98, 217257338), (196, 108628669), (229, 92974756), (458, 46487378), (523, 40709788), (907, 23474332), (916, 23243689), (1046, 20354894), (1603, 13282108), (1814, 11737166), (2092, 10177447), (3206, 6641054), (3628, 5868583), (3661, 5815684), (6349, 3353476), (6412, 3320527), (7322, 2907842), (11221, 1897444), (12698, 1676738), (14644, 1453921), (22442, 948722), (25396, 838369), (25627, 830812), (44443, 479068), (44884, 474361), (51254, 415406), (88886, 239534), (102508, 207703), (119767, 177772)]