21350925

素因数分解:

$3^3\times 5^2\times {\mathrm{47}}^1\times {\mathrm{673}}^1$

素因数の和:739

約数の個数: 48

約数和(自身を含む): 40116480

約数和(自身を除く): 18765555

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 47, 75, 135, 141, 225, 235, 423, 673, 675, 705, 1175, 1269, 2019, 2115, 3365, 3525, 6057, 6345, 10095, 10575, 16825, 18171, 30285, 31631, 31725, 50475, 90855, 94893, 151425, 158155, 284679, 454275, 474465, 790775, 854037, 1423395, 2372325, 4270185, 7116975, 21350925]

約数ペア:

[(1, 21350925), (3, 7116975), (5, 4270185), (9, 2372325), (15, 1423395), (25, 854037), (27, 790775), (45, 474465), (47, 454275), (75, 284679), (135, 158155), (141, 151425), (225, 94893), (235, 90855), (423, 50475), (673, 31725), (675, 31631), (705, 30285), (1175, 18171), (1269, 16825), (2019, 10575), (2115, 10095), (3365, 6345), (3525, 6057)]