19978064

素因数分解:

$2^4\times {\mathrm{661}}^1\times {\mathrm{1889}}^1$

素因数の和:2558

約数の個数: 20

約数和(自身を含む): 38786580

約数和(自身を除く): 18808516

約数列:

[1, 2, 4, 8, 16, 661, 1322, 1889, 2644, 3778, 5288, 7556, 10576, 15112, 30224, 1248629, 2497258, 4994516, 9989032, 19978064]

約数ペア:

[(1, 19978064), (2, 9989032), (4, 4994516), (8, 2497258), (16, 1248629), (661, 30224), (1322, 15112), (1889, 10576), (2644, 7556), (3778, 5288)]