20401839

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{229}}^1\times {\mathrm{521}}^1$

素因数の和:775

約数の個数: 24

約数和(自身を含む): 31215600

約数和(自身を除く): 10813761

約数列:

[1, 3, 9, 19, 57, 171, 229, 521, 687, 1563, 2061, 4351, 4689, 9899, 13053, 29697, 39159, 89091, 119309, 357927, 1073781, 2266871, 6800613, 20401839]

約数ペア:

[(1, 20401839), (3, 6800613), (9, 2266871), (19, 1073781), (57, 357927), (171, 119309), (229, 89091), (521, 39159), (687, 29697), (1563, 13053), (2061, 9899), (4351, 4689)]