28687400

素因数分解:

$2^3\times 5^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{661}}^1$

素因数の和:715

約数の個数: 96

約数和(自身を含む): 78804480

約数和(自身を除く): 50117080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 25, 28, 31, 35, 40, 50, 56, 62, 70, 100, 124, 140, 155, 175, 200, 217, 248, 280, 310, 350, 434, 620, 661, 700, 775, 868, 1085, 1240, 1322, 1400, 1550, 1736, 2170, 2644, 3100, 3305, 4340, 4627, 5288, 5425, 6200, 6610, 8680, 9254, 10850, 13220, 16525, 18508, 20491, 21700, 23135, 26440, 33050, 37016, 40982, 43400, 46270, 66100, 81964, 92540, 102455, 115675, 132200, 143437, 163928, 185080, 204910, 231350, 286874, 409820, 462700, 512275, 573748, 717185, 819640, 925400, 1024550, 1147496, 1434370, 2049100, 2868740, 3585925, 4098200, 5737480, 7171850, 14343700, 28687400]

約数ペア:

[(1, 28687400), (2, 14343700), (4, 7171850), (5, 5737480), (7, 4098200), (8, 3585925), (10, 2868740), (14, 2049100), (20, 1434370), (25, 1147496), (28, 1024550), (31, 925400), (35, 819640), (40, 717185), (50, 573748), (56, 512275), (62, 462700), (70, 409820), (100, 286874), (124, 231350), (140, 204910), (155, 185080), (175, 163928), (200, 143437), (217, 132200), (248, 115675), (280, 102455), (310, 92540), (350, 81964), (434, 66100), (620, 46270), (661, 43400), (700, 40982), (775, 37016), (868, 33050), (1085, 26440), (1240, 23135), (1322, 21700), (1400, 20491), (1550, 18508), (1736, 16525), (2170, 13220), (2644, 10850), (3100, 9254), (3305, 8680), (4340, 6610), (4627, 6200), (5288, 5425)]