77881780

素因数分解:

$2^2\times 5^1\times {\mathrm{409}}^1\times {\mathrm{9521}}^1$

素因数の和:9939

約数の個数: 24

約数和(自身を含む): 163968840

約数和(自身を除く): 86087060

約数列:

[1, 2, 4, 5, 10, 20, 409, 818, 1636, 2045, 4090, 8180, 9521, 19042, 38084, 47605, 95210, 190420, 3894089, 7788178, 15576356, 19470445, 38940890, 77881780]

約数ペア:

[(1, 77881780), (2, 38940890), (4, 19470445), (5, 15576356), (10, 7788178), (20, 3894089), (409, 190420), (818, 95210), (1636, 47605), (2045, 38084), (4090, 19042), (8180, 9521)]