21688900

素因数分解:

$2^2\times 5^2\times {\mathrm{107}}^1\times {\mathrm{2027}}^1$

素因数の和:2148

約数の個数: 36

約数和(自身を含む): 47528208

約数和(自身を除く): 25839308

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 107, 214, 428, 535, 1070, 2027, 2140, 2675, 4054, 5350, 8108, 10135, 10700, 20270, 40540, 50675, 101350, 202700, 216889, 433778, 867556, 1084445, 2168890, 4337780, 5422225, 10844450, 21688900]

約数ペア:

[(1, 21688900), (2, 10844450), (4, 5422225), (5, 4337780), (10, 2168890), (20, 1084445), (25, 867556), (50, 433778), (100, 216889), (107, 202700), (214, 101350), (428, 50675), (535, 40540), (1070, 20270), (2027, 10700), (2140, 10135), (2675, 8108), (4054, 5350)]