20378960

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{151}}^1\times {\mathrm{241}}^1$

素因数の和:412

約数の個数: 80

約数和(自身を含む): 54734592

約数和(自身を除く): 34355632

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 151, 241, 280, 302, 482, 560, 604, 755, 964, 1057, 1205, 1208, 1510, 1687, 1928, 2114, 2410, 2416, 3020, 3374, 3856, 4228, 4820, 5285, 6040, 6748, 8435, 8456, 9640, 10570, 12080, 13496, 16870, 16912, 19280, 21140, 26992, 33740, 36391, 42280, 67480, 72782, 84560, 134960, 145564, 181955, 254737, 291128, 363910, 509474, 582256, 727820, 1018948, 1273685, 1455640, 2037896, 2547370, 2911280, 4075792, 5094740, 10189480, 20378960]

約数ペア:

[(1, 20378960), (2, 10189480), (4, 5094740), (5, 4075792), (7, 2911280), (8, 2547370), (10, 2037896), (14, 1455640), (16, 1273685), (20, 1018948), (28, 727820), (35, 582256), (40, 509474), (56, 363910), (70, 291128), (80, 254737), (112, 181955), (140, 145564), (151, 134960), (241, 84560), (280, 72782), (302, 67480), (482, 42280), (560, 36391), (604, 33740), (755, 26992), (964, 21140), (1057, 19280), (1205, 16912), (1208, 16870), (1510, 13496), (1687, 12080), (1928, 10570), (2114, 9640), (2410, 8456), (2416, 8435), (3020, 6748), (3374, 6040), (3856, 5285), (4228, 4820)]