21211220

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{55819}}^1$

素因数の和:55847

約数の個数: 24

約数和(自身を含む): 46888800

約数和(自身を除く): 25677580

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 55819, 111638, 223276, 279095, 558190, 1060561, 1116380, 2121122, 4242244, 5302805, 10605610, 21211220]

約数ペア:

[(1, 21211220), (2, 10605610), (4, 5302805), (5, 4242244), (10, 2121122), (19, 1116380), (20, 1060561), (38, 558190), (76, 279095), (95, 223276), (190, 111638), (380, 55819)]