21563800

素因数分解:

$2^3\times 5^2\times {\mathrm{137}}^1\times {\mathrm{787}}^1$

素因数の和:940

約数の個数: 48

約数和(自身を含む): 50565960

約数和(自身を除く): 29002160

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 137, 200, 274, 548, 685, 787, 1096, 1370, 1574, 2740, 3148, 3425, 3935, 5480, 6296, 6850, 7870, 13700, 15740, 19675, 27400, 31480, 39350, 78700, 107819, 157400, 215638, 431276, 539095, 862552, 1078190, 2156380, 2695475, 4312760, 5390950, 10781900, 21563800]

約数ペア:

[(1, 21563800), (2, 10781900), (4, 5390950), (5, 4312760), (8, 2695475), (10, 2156380), (20, 1078190), (25, 862552), (40, 539095), (50, 431276), (100, 215638), (137, 157400), (200, 107819), (274, 78700), (548, 39350), (685, 31480), (787, 27400), (1096, 19675), (1370, 15740), (1574, 13700), (2740, 7870), (3148, 6850), (3425, 6296), (3935, 5480)]