19781780

素因数分解:

$2^2\times 5^1\times {\mathrm{113}}^1\times {\mathrm{8753}}^1$

素因数の和:8875

約数の個数: 24

約数和(自身を含む): 41914152

約数和(自身を除く): 22132372

約数列:

[1, 2, 4, 5, 10, 20, 113, 226, 452, 565, 1130, 2260, 8753, 17506, 35012, 43765, 87530, 175060, 989089, 1978178, 3956356, 4945445, 9890890, 19781780]

約数ペア:

[(1, 19781780), (2, 9890890), (4, 4945445), (5, 3956356), (10, 1978178), (20, 989089), (113, 175060), (226, 87530), (452, 43765), (565, 35012), (1130, 17506), (2260, 8753)]