21665497

素因数分解:

$7^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{839}}^1$

素因数の和:901

約数の個数: 24

約数和(自身を含む): 27578880

約数和(自身を除く): 5913383

約数列:

[1, 7, 17, 31, 49, 119, 217, 527, 833, 839, 1519, 3689, 5873, 14263, 25823, 26009, 41111, 99841, 182063, 442153, 698887, 1274441, 3095071, 21665497]

約数ペア:

[(1, 21665497), (7, 3095071), (17, 1274441), (31, 698887), (49, 442153), (119, 182063), (217, 99841), (527, 41111), (833, 26009), (839, 25823), (1519, 14263), (3689, 5873)]