20461665

素因数分解:

$3^1\times 5^1\times 7^3\times {\mathrm{41}}^1\times {\mathrm{97}}^1$

素因数の和:167

約数の個数: 64

約数和(自身を含む): 39513600

約数和(自身を除く): 19051935

約数列:

[1, 3, 5, 7, 15, 21, 35, 41, 49, 97, 105, 123, 147, 205, 245, 287, 291, 343, 485, 615, 679, 735, 861, 1029, 1435, 1455, 1715, 2009, 2037, 3395, 3977, 4305, 4753, 5145, 6027, 10045, 10185, 11931, 14063, 14259, 19885, 23765, 27839, 30135, 33271, 42189, 59655, 70315, 71295, 83517, 99813, 139195, 166355, 194873, 210945, 417585, 499065, 584619, 974365, 1364111, 2923095, 4092333, 6820555, 20461665]

約数ペア:

[(1, 20461665), (3, 6820555), (5, 4092333), (7, 2923095), (15, 1364111), (21, 974365), (35, 584619), (41, 499065), (49, 417585), (97, 210945), (105, 194873), (123, 166355), (147, 139195), (205, 99813), (245, 83517), (287, 71295), (291, 70315), (343, 59655), (485, 42189), (615, 33271), (679, 30135), (735, 27839), (861, 23765), (1029, 19885), (1435, 14259), (1455, 14063), (1715, 11931), (2009, 10185), (2037, 10045), (3395, 6027), (3977, 5145), (4305, 4753)]