21087693

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{4019}}^1$

素因数の和:4089

約数の個数: 24

約数和(自身を含む): 33864480

約数和(自身を除く): 12776787

約数列:

[1, 3, 9, 11, 33, 53, 99, 159, 477, 583, 1749, 4019, 5247, 12057, 36171, 44209, 132627, 213007, 397881, 639021, 1917063, 2343077, 7029231, 21087693]

約数ペア:

[(1, 21087693), (3, 7029231), (9, 2343077), (11, 1917063), (33, 639021), (53, 397881), (99, 213007), (159, 132627), (477, 44209), (583, 36171), (1749, 12057), (4019, 5247)]