28172140

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{12923}}^1$

素因数の和:13041

約数の個数: 24

約数和(自身を含む): 59708880

約数和(自身を除く): 31536740

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 12923, 25846, 51692, 64615, 129230, 258460, 1408607, 2817214, 5634428, 7043035, 14086070, 28172140]

約数ペア:

[(1, 28172140), (2, 14086070), (4, 7043035), (5, 5634428), (10, 2817214), (20, 1408607), (109, 258460), (218, 129230), (436, 64615), (545, 51692), (1090, 25846), (2180, 12923)]