17889890

素因数分解:

$2^1\times 5^1\times {\mathrm{89}}^1\times {\mathrm{20101}}^1$

素因数の和:20197

約数の個数: 16

約数和(自身を含む): 32565240

約数和(自身を除く): 14675350

約数列:

[1, 2, 5, 10, 89, 178, 445, 890, 20101, 40202, 100505, 201010, 1788989, 3577978, 8944945, 17889890]

約数ペア:

[(1, 17889890), (2, 8944945), (5, 3577978), (10, 1788989), (89, 201010), (178, 100505), (445, 40202), (890, 20101)]