19903120

素因数分解:

$2^4\times 5^1\times {\mathrm{248789}}^1$

素因数の和:248802

約数の個数: 20

約数和(自身を含む): 46274940

約数和(自身を除く): 26371820

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 248789, 497578, 995156, 1243945, 1990312, 2487890, 3980624, 4975780, 9951560, 19903120]

約数ペア:

[(1, 19903120), (2, 9951560), (4, 4975780), (5, 3980624), (8, 2487890), (10, 1990312), (16, 1243945), (20, 995156), (40, 497578), (80, 248789)]