21930867

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{20477}}^1$

素因数の和:20507

約数の個数: 24

約数和(自身を含む): 38334816

約数和(自身を除く): 16403949

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 119, 153, 357, 1071, 20477, 61431, 143339, 184293, 348109, 430017, 1044327, 1290051, 2436763, 3132981, 7310289, 21930867]

約数ペア:

[(1, 21930867), (3, 7310289), (7, 3132981), (9, 2436763), (17, 1290051), (21, 1044327), (51, 430017), (63, 348109), (119, 184293), (153, 143339), (357, 61431), (1071, 20477)]