2155177720

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{149}}^1\times {\mathrm{239}}^1$

素因数の和:505

約数の個数: 128

約数和(自身を含む): 5248800000

約数和(自身を除く): 3093622280

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 89, 136, 149, 170, 178, 239, 298, 340, 356, 445, 478, 596, 680, 712, 745, 890, 956, 1192, 1195, 1490, 1513, 1780, 1912, 2390, 2533, 2980, 3026, 3560, 4063, 4780, 5066, 5960, 6052, 7565, 8126, 9560, 10132, 12104, 12665, 13261, 15130, 16252, 20264, 20315, 21271, 25330, 26522, 30260, 32504, 35611, 40630, 42542, 50660, 53044, 60520, 66305, 71222, 81260, 85084, 101320, 106088, 106355, 132610, 142444, 162520, 170168, 178055, 212710, 225437, 265220, 284888, 356110, 361607, 425420, 450874, 530440, 605387, 712220, 723214, 850840, 901748, 1127185, 1210774, 1424440, 1446428, 1803496, 1808035, 2254370, 2421548, 2892856, 3026935, 3169379, 3616070, 4508740, 4843096, 6053870, 6338758, 7232140, 9017480, 12107740, 12677516, 14464280, 15846895, 24215480, 25355032, 31693790, 53879443, 63387580, 107758886, 126775160, 215517772, 269397215, 431035544, 538794430, 1077588860, 2155177720]

約数ペア:

[(1, 2155177720), (2, 1077588860), (4, 538794430), (5, 431035544), (8, 269397215), (10, 215517772), (17, 126775160), (20, 107758886), (34, 63387580), (40, 53879443), (68, 31693790), (85, 25355032), (89, 24215480), (136, 15846895), (149, 14464280), (170, 12677516), (178, 12107740), (239, 9017480), (298, 7232140), (340, 6338758), (356, 6053870), (445, 4843096), (478, 4508740), (596, 3616070), (680, 3169379), (712, 3026935), (745, 2892856), (890, 2421548), (956, 2254370), (1192, 1808035), (1195, 1803496), (1490, 1446428), (1513, 1424440), (1780, 1210774), (1912, 1127185), (2390, 901748), (2533, 850840), (2980, 723214), (3026, 712220), (3560, 605387), (4063, 530440), (4780, 450874), (5066, 425420), (5960, 361607), (6052, 356110), (7565, 284888), (8126, 265220), (9560, 225437), (10132, 212710), (12104, 178055), (12665, 170168), (13261, 162520), (15130, 142444), (16252, 132610), (20264, 106355), (20315, 106088), (21271, 101320), (25330, 85084), (26522, 81260), (30260, 71222), (32504, 66305), (35611, 60520), (40630, 53044), (42542, 50660)]