21139916390

素因数分解:

$2^1\times 5^1\times {\mathrm{10139}}^1\times {\mathrm{208501}}^1$

素因数の和:218647

約数の個数: 16

約数和(自身を含む): 38055785040

約数和(自身を除く): 16915868650

約数列:

[1, 2, 5, 10, 10139, 20278, 50695, 101390, 208501, 417002, 1042505, 2085010, 2113991639, 4227983278, 10569958195, 21139916390]

約数ペア:

[(1, 21139916390), (2, 10569958195), (5, 4227983278), (10, 2113991639), (10139, 2085010), (20278, 1042505), (50695, 417002), (101390, 208501)]