21207804921

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{124022251}}^1$

素因数の和:124022276

約数の個数: 12

約数和(自身を含む): 32245785520

約数和(自身を除く): 11037980599

約数列:

[1, 3, 9, 19, 57, 171, 124022251, 372066753, 1116200259, 2356422769, 7069268307, 21207804921]

約数ペア:

[(1, 21207804921), (3, 7069268307), (9, 2356422769), (19, 1116200259), (57, 372066753), (171, 124022251)]