20518260

素因数分解:

$2^2\times 3^1\times 5^1\times 7^3\times {\mathrm{997}}^1$

素因数の和:1030

約数の個数: 96

約数和(自身を含む): 67065600

約数和(自身を除く): 46547340

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 84, 98, 105, 140, 147, 196, 210, 245, 294, 343, 420, 490, 588, 686, 735, 980, 997, 1029, 1372, 1470, 1715, 1994, 2058, 2940, 2991, 3430, 3988, 4116, 4985, 5145, 5982, 6860, 6979, 9970, 10290, 11964, 13958, 14955, 19940, 20580, 20937, 27916, 29910, 34895, 41874, 48853, 59820, 69790, 83748, 97706, 104685, 139580, 146559, 195412, 209370, 244265, 293118, 341971, 418740, 488530, 586236, 683942, 732795, 977060, 1025913, 1367884, 1465590, 1709855, 2051826, 2931180, 3419710, 4103652, 5129565, 6839420, 10259130, 20518260]

約数ペア:

[(1, 20518260), (2, 10259130), (3, 6839420), (4, 5129565), (5, 4103652), (6, 3419710), (7, 2931180), (10, 2051826), (12, 1709855), (14, 1465590), (15, 1367884), (20, 1025913), (21, 977060), (28, 732795), (30, 683942), (35, 586236), (42, 488530), (49, 418740), (60, 341971), (70, 293118), (84, 244265), (98, 209370), (105, 195412), (140, 146559), (147, 139580), (196, 104685), (210, 97706), (245, 83748), (294, 69790), (343, 59820), (420, 48853), (490, 41874), (588, 34895), (686, 29910), (735, 27916), (980, 20937), (997, 20580), (1029, 19940), (1372, 14955), (1470, 13958), (1715, 11964), (1994, 10290), (2058, 9970), (2940, 6979), (2991, 6860), (3430, 5982), (3988, 5145), (4116, 4985)]