21005691

素因数分解:

$3^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{11239}}^1$

素因数の和:11338

約数の個数: 16

約数和(自身を含む): 32371200

約数和(自身を除く): 11365509

約数列:

[1, 3, 7, 21, 89, 267, 623, 1869, 11239, 33717, 78673, 236019, 1000271, 3000813, 7001897, 21005691]

約数ペア:

[(1, 21005691), (3, 7001897), (7, 3000813), (21, 1000271), (89, 236019), (267, 78673), (623, 33717), (1869, 11239)]