21005145

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{66683}}^1$

素因数の和:66701

約数の個数: 24

約数和(自身を含む): 41610816

約数和(自身を除く): 20605671

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315, 66683, 200049, 333415, 466781, 600147, 1000245, 1400343, 2333905, 3000735, 4201029, 7001715, 21005145]

約数ペア:

[(1, 21005145), (3, 7001715), (5, 4201029), (7, 3000735), (9, 2333905), (15, 1400343), (21, 1000245), (35, 600147), (45, 466781), (63, 333415), (105, 200049), (315, 66683)]