19788700

素因数分解:

$2^2\times 5^2\times {\mathrm{197887}}^1$

素因数の和:197901

約数の個数: 18

約数和(自身を含む): 42941696

約数和(自身を除く): 23152996

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 197887, 395774, 791548, 989435, 1978870, 3957740, 4947175, 9894350, 19788700]

約数ペア:

[(1, 19788700), (2, 9894350), (4, 4947175), (5, 3957740), (10, 1978870), (20, 989435), (25, 791548), (50, 395774), (100, 197887)]