19781390

素因数分解:

$2^1\times 5^1\times {\mathrm{83}}^1\times {\mathrm{23833}}^1$

素因数の和:23923

約数の個数: 16

約数和(自身を含む): 36037008

約数和(自身を除く): 16255618

約数列:

[1, 2, 5, 10, 83, 166, 415, 830, 23833, 47666, 119165, 238330, 1978139, 3956278, 9890695, 19781390]

約数ペア:

[(1, 19781390), (2, 9890695), (5, 3956278), (10, 1978139), (83, 238330), (166, 119165), (415, 47666), (830, 23833)]