21642795

素因数分解:

$3^5\times 5^1\times {\mathrm{47}}^1\times {\mathrm{379}}^1$

素因数の和:446

約数の個数: 48

約数和(自身を含む): 39836160

約数和(自身を除く): 18193365

約数列:

[1, 3, 5, 9, 15, 27, 45, 47, 81, 135, 141, 235, 243, 379, 405, 423, 705, 1137, 1215, 1269, 1895, 2115, 3411, 3807, 5685, 6345, 10233, 11421, 17055, 17813, 19035, 30699, 51165, 53439, 57105, 89065, 92097, 153495, 160317, 267195, 460485, 480951, 801585, 1442853, 2404755, 4328559, 7214265, 21642795]

約数ペア:

[(1, 21642795), (3, 7214265), (5, 4328559), (9, 2404755), (15, 1442853), (27, 801585), (45, 480951), (47, 460485), (81, 267195), (135, 160317), (141, 153495), (235, 92097), (243, 89065), (379, 57105), (405, 53439), (423, 51165), (705, 30699), (1137, 19035), (1215, 17813), (1269, 17055), (1895, 11421), (2115, 10233), (3411, 6345), (3807, 5685)]