21256208

素因数分解:

$2^4\times {\mathrm{401}}^1\times {\mathrm{3313}}^1$

素因数の和:3722

約数の個数: 20

約数和(自身を含む): 41299068

約数和(自身を除く): 20042860

約数列:

[1, 2, 4, 8, 16, 401, 802, 1604, 3208, 3313, 6416, 6626, 13252, 26504, 53008, 1328513, 2657026, 5314052, 10628104, 21256208]

約数ペア:

[(1, 21256208), (2, 10628104), (4, 5314052), (8, 2657026), (16, 1328513), (401, 53008), (802, 26504), (1604, 13252), (3208, 6626), (3313, 6416)]