19780016

素因数分解:

$2^4\times {\mathrm{277}}^1\times {\mathrm{4463}}^1$

素因数の和:4748

約数の個数: 20

約数和(自身を含む): 38470752

約数和(自身を除く): 18690736

約数列:

[1, 2, 4, 8, 16, 277, 554, 1108, 2216, 4432, 4463, 8926, 17852, 35704, 71408, 1236251, 2472502, 4945004, 9890008, 19780016]

約数ペア:

[(1, 19780016), (2, 9890008), (4, 4945004), (8, 2472502), (16, 1236251), (277, 71408), (554, 35704), (1108, 17852), (2216, 8926), (4432, 4463)]