21239500

素因数分解:

$2^2\times 5^3\times {\mathrm{107}}^1\times {\mathrm{397}}^1$

素因数の和:523

約数の個数: 48

約数和(自身を含む): 46938528

約数和(自身を除く): 25699028

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 107, 125, 214, 250, 397, 428, 500, 535, 794, 1070, 1588, 1985, 2140, 2675, 3970, 5350, 7940, 9925, 10700, 13375, 19850, 26750, 39700, 42479, 49625, 53500, 84958, 99250, 169916, 198500, 212395, 424790, 849580, 1061975, 2123950, 4247900, 5309875, 10619750, 21239500]

約数ペア:

[(1, 21239500), (2, 10619750), (4, 5309875), (5, 4247900), (10, 2123950), (20, 1061975), (25, 849580), (50, 424790), (100, 212395), (107, 198500), (125, 169916), (214, 99250), (250, 84958), (397, 53500), (428, 49625), (500, 42479), (535, 39700), (794, 26750), (1070, 19850), (1588, 13375), (1985, 10700), (2140, 9925), (2675, 7940), (3970, 5350)]