20378120

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{281}}^1$

素因数の和:343

約数の個数: 96

約数和(自身を含む): 54973080

約数和(自身を除く): 34594960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 37, 40, 49, 56, 70, 74, 98, 140, 148, 185, 196, 245, 259, 280, 281, 296, 370, 392, 490, 518, 562, 740, 980, 1036, 1124, 1295, 1405, 1480, 1813, 1960, 1967, 2072, 2248, 2590, 2810, 3626, 3934, 5180, 5620, 7252, 7868, 9065, 9835, 10360, 10397, 11240, 13769, 14504, 15736, 18130, 19670, 20794, 27538, 36260, 39340, 41588, 51985, 55076, 68845, 72520, 72779, 78680, 83176, 103970, 110152, 137690, 145558, 207940, 275380, 291116, 363895, 415880, 509453, 550760, 582232, 727790, 1018906, 1455580, 2037812, 2547265, 2911160, 4075624, 5094530, 10189060, 20378120]

約数ペア:

[(1, 20378120), (2, 10189060), (4, 5094530), (5, 4075624), (7, 2911160), (8, 2547265), (10, 2037812), (14, 1455580), (20, 1018906), (28, 727790), (35, 582232), (37, 550760), (40, 509453), (49, 415880), (56, 363895), (70, 291116), (74, 275380), (98, 207940), (140, 145558), (148, 137690), (185, 110152), (196, 103970), (245, 83176), (259, 78680), (280, 72779), (281, 72520), (296, 68845), (370, 55076), (392, 51985), (490, 41588), (518, 39340), (562, 36260), (740, 27538), (980, 20794), (1036, 19670), (1124, 18130), (1295, 15736), (1405, 14504), (1480, 13769), (1813, 11240), (1960, 10397), (1967, 10360), (2072, 9835), (2248, 9065), (2590, 7868), (2810, 7252), (3626, 5620), (3934, 5180)]