21581235

素因数分解:

$3^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{4099}}^1$

素因数の和:4129

約数の個数: 40

約数和(自身を含む): 41672400

約数和(自身を除く): 20091165

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 45, 65, 81, 117, 135, 195, 351, 405, 585, 1053, 1755, 4099, 5265, 12297, 20495, 36891, 53287, 61485, 110673, 159861, 184455, 266435, 332019, 479583, 553365, 799305, 1438749, 1660095, 2397915, 4316247, 7193745, 21581235]

約数ペア:

[(1, 21581235), (3, 7193745), (5, 4316247), (9, 2397915), (13, 1660095), (15, 1438749), (27, 799305), (39, 553365), (45, 479583), (65, 332019), (81, 266435), (117, 184455), (135, 159861), (195, 110673), (351, 61485), (405, 53287), (585, 36891), (1053, 20495), (1755, 12297), (4099, 5265)]