21978740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{4243}}^1$

素因数の和:4296

約数の個数: 48

約数和(自身を含む): 54187392

約数和(自身を除く): 32208652

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 37, 70, 74, 140, 148, 185, 259, 370, 518, 740, 1036, 1295, 2590, 4243, 5180, 8486, 16972, 21215, 29701, 42430, 59402, 84860, 118804, 148505, 156991, 297010, 313982, 594020, 627964, 784955, 1098937, 1569910, 2197874, 3139820, 4395748, 5494685, 10989370, 21978740]

約数ペア:

[(1, 21978740), (2, 10989370), (4, 5494685), (5, 4395748), (7, 3139820), (10, 2197874), (14, 1569910), (20, 1098937), (28, 784955), (35, 627964), (37, 594020), (70, 313982), (74, 297010), (140, 156991), (148, 148505), (185, 118804), (259, 84860), (370, 59402), (518, 42430), (740, 29701), (1036, 21215), (1295, 16972), (2590, 8486), (4243, 5180)]