21348565

素因数分解:

$5^1\times 7^2\times {\mathrm{79}}^1\times {\mathrm{1103}}^1$

素因数の和:1201

約数の個数: 24

約数和(自身を含む): 30205440

約数和(自身を除く): 8856875

約数列:

[1, 5, 7, 35, 49, 79, 245, 395, 553, 1103, 2765, 3871, 5515, 7721, 19355, 38605, 54047, 87137, 270235, 435685, 609959, 3049795, 4269713, 21348565]

約数ペア:

[(1, 21348565), (5, 4269713), (7, 3049795), (35, 609959), (49, 435685), (79, 270235), (245, 87137), (395, 54047), (553, 38605), (1103, 19355), (2765, 7721), (3871, 5515)]