21479715

素因数分解:

$3^3\times 5^1\times {\mathrm{107}}^1\times {\mathrm{1487}}^1$

素因数の和:1608

約数の個数: 32

約数和(自身を含む): 38568960

約数和(自身を除く): 17089245

約数列:

[1, 3, 5, 9, 15, 27, 45, 107, 135, 321, 535, 963, 1487, 1605, 2889, 4461, 4815, 7435, 13383, 14445, 22305, 40149, 66915, 159109, 200745, 477327, 795545, 1431981, 2386635, 4295943, 7159905, 21479715]

約数ペア:

[(1, 21479715), (3, 7159905), (5, 4295943), (9, 2386635), (15, 1431981), (27, 795545), (45, 477327), (107, 200745), (135, 159109), (321, 66915), (535, 40149), (963, 22305), (1487, 14445), (1605, 13383), (2889, 7435), (4461, 4815)]