257898520

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^2\times {\mathrm{317}}^1$

素因数の和:425

約数の個数: 96

約数和(自身を含む): 650131920

約数和(自身を除く): 392233400

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 43, 44, 55, 86, 88, 110, 172, 215, 220, 317, 344, 430, 440, 473, 634, 860, 946, 1268, 1585, 1720, 1849, 1892, 2365, 2536, 3170, 3487, 3698, 3784, 4730, 6340, 6974, 7396, 9245, 9460, 12680, 13631, 13948, 14792, 17435, 18490, 18920, 20339, 27262, 27896, 34870, 36980, 40678, 54524, 68155, 69740, 73960, 81356, 101695, 109048, 136310, 139480, 149941, 162712, 203390, 272620, 299882, 406780, 545240, 586133, 599764, 749705, 813560, 1172266, 1199528, 1499410, 2344532, 2930665, 2998820, 4689064, 5861330, 5997640, 6447463, 11722660, 12894926, 23445320, 25789852, 32237315, 51579704, 64474630, 128949260, 257898520]

約数ペア:

[(1, 257898520), (2, 128949260), (4, 64474630), (5, 51579704), (8, 32237315), (10, 25789852), (11, 23445320), (20, 12894926), (22, 11722660), (40, 6447463), (43, 5997640), (44, 5861330), (55, 4689064), (86, 2998820), (88, 2930665), (110, 2344532), (172, 1499410), (215, 1199528), (220, 1172266), (317, 813560), (344, 749705), (430, 599764), (440, 586133), (473, 545240), (634, 406780), (860, 299882), (946, 272620), (1268, 203390), (1585, 162712), (1720, 149941), (1849, 139480), (1892, 136310), (2365, 109048), (2536, 101695), (3170, 81356), (3487, 73960), (3698, 69740), (3784, 68155), (4730, 54524), (6340, 40678), (6974, 36980), (7396, 34870), (9245, 27896), (9460, 27262), (12680, 20339), (13631, 18920), (13948, 18490), (14792, 17435)]