25981221

素因数分解:

$3^1\times 7^4\times {\mathrm{3607}}^1$

素因数の和:3638

約数の個数: 20

約数和(自身を含む): 40424032

約数和(自身を除く): 14442811

約数列:

[1, 3, 7, 21, 49, 147, 343, 1029, 2401, 3607, 7203, 10821, 25249, 75747, 176743, 530229, 1237201, 3711603, 8660407, 25981221]

約数ペア:

[(1, 25981221), (3, 8660407), (7, 3711603), (21, 1237201), (49, 530229), (147, 176743), (343, 75747), (1029, 25249), (2401, 10821), (3607, 7203)]