19805450

素因数分解:

$2^1\times 5^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{797}}^1$

素因数の和:887

約数の個数: 48

約数和(自身を含む): 42747264

約数和(自身を除く): 22941814

約数列:

[1, 2, 5, 7, 10, 14, 25, 35, 50, 70, 71, 142, 175, 350, 355, 497, 710, 797, 994, 1594, 1775, 2485, 3550, 3985, 4970, 5579, 7970, 11158, 12425, 19925, 24850, 27895, 39850, 55790, 56587, 113174, 139475, 278950, 282935, 396109, 565870, 792218, 1414675, 1980545, 2829350, 3961090, 9902725, 19805450]

約数ペア:

[(1, 19805450), (2, 9902725), (5, 3961090), (7, 2829350), (10, 1980545), (14, 1414675), (25, 792218), (35, 565870), (50, 396109), (70, 282935), (71, 278950), (142, 139475), (175, 113174), (350, 56587), (355, 55790), (497, 39850), (710, 27895), (797, 24850), (994, 19925), (1594, 12425), (1775, 11158), (2485, 7970), (3550, 5579), (3985, 4970)]