257607880

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{1487}}^1$

素因数の和:1630

約数の個数: 64

約数和(自身を含む): 597818880

約数和(自身を除く): 340211000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 71, 122, 142, 244, 284, 305, 355, 488, 568, 610, 710, 1220, 1420, 1487, 2440, 2840, 2974, 4331, 5948, 7435, 8662, 11896, 14870, 17324, 21655, 29740, 34648, 43310, 59480, 86620, 90707, 105577, 173240, 181414, 211154, 362828, 422308, 453535, 527885, 725656, 844616, 907070, 1055770, 1814140, 2111540, 3628280, 4223080, 6440197, 12880394, 25760788, 32200985, 51521576, 64401970, 128803940, 257607880]

約数ペア:

[(1, 257607880), (2, 128803940), (4, 64401970), (5, 51521576), (8, 32200985), (10, 25760788), (20, 12880394), (40, 6440197), (61, 4223080), (71, 3628280), (122, 2111540), (142, 1814140), (244, 1055770), (284, 907070), (305, 844616), (355, 725656), (488, 527885), (568, 453535), (610, 422308), (710, 362828), (1220, 211154), (1420, 181414), (1487, 173240), (2440, 105577), (2840, 90707), (2974, 86620), (4331, 59480), (5948, 43310), (7435, 34648), (8662, 29740), (11896, 21655), (14870, 17324)]