21242845

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{4603}}^1$

素因数の和:4692

約数の個数: 16

約数和(自身を含む): 27844992

約数和(自身を除く): 6602147

約数列:

[1, 5, 13, 65, 71, 355, 923, 4603, 4615, 23015, 59839, 299195, 326813, 1634065, 4248569, 21242845]

約数ペア:

[(1, 21242845), (5, 4248569), (13, 1634065), (65, 326813), (71, 299195), (355, 59839), (923, 23015), (4603, 4615)]