20637580

素因数分解:

$2^2\times 5^1\times {\mathrm{523}}^1\times {\mathrm{1973}}^1$

素因数の和:2505

約数の個数: 24

約数和(自身を含む): 43443792

約数和(自身を除く): 22806212

約数列:

[1, 2, 4, 5, 10, 20, 523, 1046, 1973, 2092, 2615, 3946, 5230, 7892, 9865, 10460, 19730, 39460, 1031879, 2063758, 4127516, 5159395, 10318790, 20637580]

約数ペア:

[(1, 20637580), (2, 10318790), (4, 5159395), (5, 4127516), (10, 2063758), (20, 1031879), (523, 39460), (1046, 19730), (1973, 10460), (2092, 9865), (2615, 7892), (3946, 5230)]