20954000

素因数分解:

$2^4\times 5^3\times {\mathrm{10477}}^1$

素因数の和:10500

約数の個数: 40

約数和(自身を含む): 50671608

約数和(自身を除く): 29717608

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 1000, 2000, 10477, 20954, 41908, 52385, 83816, 104770, 167632, 209540, 261925, 419080, 523850, 838160, 1047700, 1309625, 2095400, 2619250, 4190800, 5238500, 10477000, 20954000]

約数ペア:

[(1, 20954000), (2, 10477000), (4, 5238500), (5, 4190800), (8, 2619250), (10, 2095400), (16, 1309625), (20, 1047700), (25, 838160), (40, 523850), (50, 419080), (80, 261925), (100, 209540), (125, 167632), (200, 104770), (250, 83816), (400, 52385), (500, 41908), (1000, 20954), (2000, 10477)]