21039916

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{2741}}^1$

素因数の和:2865

約数の個数: 24

約数和(自身を含む): 39155760

約数和(自身を除く): 18115844

約数列:

[1, 2, 4, 19, 38, 76, 101, 202, 404, 1919, 2741, 3838, 5482, 7676, 10964, 52079, 104158, 208316, 276841, 553682, 1107364, 5259979, 10519958, 21039916]

約数ペア:

[(1, 21039916), (2, 10519958), (4, 5259979), (19, 1107364), (38, 553682), (76, 276841), (101, 208316), (202, 104158), (404, 52079), (1919, 10964), (2741, 7676), (3838, 5482)]