20784015

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{65981}}^1$

素因数の和:65999

約数の個数: 24

約数和(自身を含む): 41172768

約数和(自身を除く): 20388753

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315, 65981, 197943, 329905, 461867, 593829, 989715, 1385601, 2309335, 2969145, 4156803, 6928005, 20784015]

約数ペア:

[(1, 20784015), (3, 6928005), (5, 4156803), (7, 2969145), (9, 2309335), (15, 1385601), (21, 989715), (35, 593829), (45, 461867), (63, 329905), (105, 197943), (315, 65981)]