21087800

素因数分解:

$2^3\times 5^2\times {\mathrm{97}}^1\times {\mathrm{1087}}^1$

素因数の和:1200

約数の個数: 48

約数和(自身を含む): 49580160

約数和(自身を除く): 28492360

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 97, 100, 194, 200, 388, 485, 776, 970, 1087, 1940, 2174, 2425, 3880, 4348, 4850, 5435, 8696, 9700, 10870, 19400, 21740, 27175, 43480, 54350, 105439, 108700, 210878, 217400, 421756, 527195, 843512, 1054390, 2108780, 2635975, 4217560, 5271950, 10543900, 21087800]

約数ペア:

[(1, 21087800), (2, 10543900), (4, 5271950), (5, 4217560), (8, 2635975), (10, 2108780), (20, 1054390), (25, 843512), (40, 527195), (50, 421756), (97, 217400), (100, 210878), (194, 108700), (200, 105439), (388, 54350), (485, 43480), (776, 27175), (970, 21740), (1087, 19400), (1940, 10870), (2174, 9700), (2425, 8696), (3880, 5435), (4348, 4850)]