21407900

素因数分解:

$2^2\times 5^2\times {\mathrm{97}}^1\times {\mathrm{2207}}^1$

素因数の和:2318

約数の個数: 36

約数和(自身を含む): 46955328

約数和(自身を除く): 25547428

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 97, 100, 194, 388, 485, 970, 1940, 2207, 2425, 4414, 4850, 8828, 9700, 11035, 22070, 44140, 55175, 110350, 214079, 220700, 428158, 856316, 1070395, 2140790, 4281580, 5351975, 10703950, 21407900]

約数ペア:

[(1, 21407900), (2, 10703950), (4, 5351975), (5, 4281580), (10, 2140790), (20, 1070395), (25, 856316), (50, 428158), (97, 220700), (100, 214079), (194, 110350), (388, 55175), (485, 44140), (970, 22070), (1940, 11035), (2207, 9700), (2425, 8828), (4414, 4850)]