21399245

素因数分解:

$5^1\times 7^1\times {\mathrm{29}}^2\times {\mathrm{727}}^1$

素因数の和:797

約数の個数: 24

約数和(自身を含む): 30436224

約数和(自身を除く): 9036979

約数列:

[1, 5, 7, 29, 35, 145, 203, 727, 841, 1015, 3635, 4205, 5089, 5887, 21083, 25445, 29435, 105415, 147581, 611407, 737905, 3057035, 4279849, 21399245]

約数ペア:

[(1, 21399245), (5, 4279849), (7, 3057035), (29, 737905), (35, 611407), (145, 147581), (203, 105415), (727, 29435), (841, 25445), (1015, 21083), (3635, 5887), (4205, 5089)]