21720826

素因数分解:

$2^1\times {\mathrm{29}}^1\times {\mathrm{197}}^1\times {\mathrm{1901}}^1$

素因数の和:2129

約数の個数: 16

約数和(自身を含む): 33893640

約数和(自身を除く): 12172814

約数列:

[1, 2, 29, 58, 197, 394, 1901, 3802, 5713, 11426, 55129, 110258, 374497, 748994, 10860413, 21720826]

約数ペア:

[(1, 21720826), (2, 10860413), (29, 748994), (58, 374497), (197, 110258), (394, 55129), (1901, 11426), (3802, 5713)]