21021007

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1\times {\mathrm{1327}}^1$

素因数の和:1438

約数の個数: 16

約数和(自身を含む): 25157632

約数和(自身を除く): 4136625

約数列:

[1, 7, 31, 73, 217, 511, 1327, 2263, 9289, 15841, 41137, 96871, 287959, 678097, 3003001, 21021007]

約数ペア:

[(1, 21021007), (7, 3003001), (31, 678097), (73, 287959), (217, 96871), (511, 41137), (1327, 15841), (2263, 9289)]