28953620

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{131}}^1\times {\mathrm{257}}^1$

素因数の和:440

約数の個数: 48

約数和(自身を含む): 62935488

約数和(自身を除く): 33981868

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 131, 172, 215, 257, 262, 430, 514, 524, 655, 860, 1028, 1285, 1310, 2570, 2620, 5140, 5633, 11051, 11266, 22102, 22532, 28165, 33667, 44204, 55255, 56330, 67334, 110510, 112660, 134668, 168335, 221020, 336670, 673340, 1447681, 2895362, 5790724, 7238405, 14476810, 28953620]

約数ペア:

[(1, 28953620), (2, 14476810), (4, 7238405), (5, 5790724), (10, 2895362), (20, 1447681), (43, 673340), (86, 336670), (131, 221020), (172, 168335), (215, 134668), (257, 112660), (262, 110510), (430, 67334), (514, 56330), (524, 55255), (655, 44204), (860, 33667), (1028, 28165), (1285, 22532), (1310, 22102), (2570, 11266), (2620, 11051), (5140, 5633)]