20809804

素因数分解:

$2^2\times {\mathrm{31}}^1\times {\mathrm{257}}^1\times {\mathrm{653}}^1$

素因数の和:945

約数の個数: 24

約数和(自身を含む): 37795968

約数和(自身を除く): 16986164

約数列:

[1, 2, 4, 31, 62, 124, 257, 514, 653, 1028, 1306, 2612, 7967, 15934, 20243, 31868, 40486, 80972, 167821, 335642, 671284, 5202451, 10404902, 20809804]

約数ペア:

[(1, 20809804), (2, 10404902), (4, 5202451), (31, 671284), (62, 335642), (124, 167821), (257, 80972), (514, 40486), (653, 31868), (1028, 20243), (1306, 15934), (2612, 7967)]