21590556

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^1\times {\mathrm{138401}}^1$

素因数の和:138421

約数の個数: 24

約数和(自身を含む): 54253584

約数和(自身を除く): 32663028

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 78, 156, 138401, 276802, 415203, 553604, 830406, 1660812, 1799213, 3598426, 5397639, 7196852, 10795278, 21590556]

約数ペア:

[(1, 21590556), (2, 10795278), (3, 7196852), (4, 5397639), (6, 3598426), (12, 1799213), (13, 1660812), (26, 830406), (39, 553604), (52, 415203), (78, 276802), (156, 138401)]