21387476

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{44189}}^1$

素因数の和:44215

約数の個数: 18

約数和(自身を含む): 41140890

約数和(自身を除く): 19753414

約数列:

[1, 2, 4, 11, 22, 44, 121, 242, 484, 44189, 88378, 176756, 486079, 972158, 1944316, 5346869, 10693738, 21387476]

約数ペア:

[(1, 21387476), (2, 10693738), (4, 5346869), (11, 1944316), (22, 972158), (44, 486079), (121, 176756), (242, 88378), (484, 44189)]