128821980

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{43}}^1\times {\mathrm{1019}}^1$

素因数の和:1088

約数の個数: 144

約数和(自身を含む): 429770880

約数和(自身を除く): 300948900

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 43, 49, 60, 70, 84, 86, 98, 105, 129, 140, 147, 172, 196, 210, 215, 245, 258, 294, 301, 420, 430, 490, 516, 588, 602, 645, 735, 860, 903, 980, 1019, 1204, 1290, 1470, 1505, 1806, 2038, 2107, 2580, 2940, 3010, 3057, 3612, 4076, 4214, 4515, 5095, 6020, 6114, 6321, 7133, 8428, 9030, 10190, 10535, 12228, 12642, 14266, 15285, 18060, 20380, 21070, 21399, 25284, 28532, 30570, 31605, 35665, 42140, 42798, 43817, 49931, 61140, 63210, 71330, 85596, 87634, 99862, 106995, 126420, 131451, 142660, 149793, 175268, 199724, 213990, 219085, 249655, 262902, 299586, 306719, 427980, 438170, 499310, 525804, 599172, 613438, 657255, 748965, 876340, 920157, 998620, 1226876, 1314510, 1497930, 1533595, 1840314, 2147033, 2629020, 2995860, 3067190, 3680628, 4294066, 4600785, 6134380, 6441099, 8588132, 9201570, 10735165, 12882198, 18403140, 21470330, 25764396, 32205495, 42940660, 64410990, 128821980]

約数ペア:

[(1, 128821980), (2, 64410990), (3, 42940660), (4, 32205495), (5, 25764396), (6, 21470330), (7, 18403140), (10, 12882198), (12, 10735165), (14, 9201570), (15, 8588132), (20, 6441099), (21, 6134380), (28, 4600785), (30, 4294066), (35, 3680628), (42, 3067190), (43, 2995860), (49, 2629020), (60, 2147033), (70, 1840314), (84, 1533595), (86, 1497930), (98, 1314510), (105, 1226876), (129, 998620), (140, 920157), (147, 876340), (172, 748965), (196, 657255), (210, 613438), (215, 599172), (245, 525804), (258, 499310), (294, 438170), (301, 427980), (420, 306719), (430, 299586), (490, 262902), (516, 249655), (588, 219085), (602, 213990), (645, 199724), (735, 175268), (860, 149793), (903, 142660), (980, 131451), (1019, 126420), (1204, 106995), (1290, 99862), (1470, 87634), (1505, 85596), (1806, 71330), (2038, 63210), (2107, 61140), (2580, 49931), (2940, 43817), (3010, 42798), (3057, 42140), (3612, 35665), (4076, 31605), (4214, 30570), (4515, 28532), (5095, 25284), (6020, 21399), (6114, 21070), (6321, 20380), (7133, 18060), (8428, 15285), (9030, 14266), (10190, 12642), (10535, 12228)]