19805990

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{86113}}^1$

素因数の和:86143

約数の個数: 16

約数和(自身を含む): 37201248

約数和(自身を除く): 17395258

約数列:

[1, 2, 5, 10, 23, 46, 115, 230, 86113, 172226, 430565, 861130, 1980599, 3961198, 9902995, 19805990]

約数ペア:

[(1, 19805990), (2, 9902995), (5, 3961198), (10, 1980599), (23, 861130), (46, 430565), (115, 172226), (230, 86113)]