21755120

素因数分解:

$2^4\times 5^1\times {\mathrm{271939}}^1$

素因数の和:271952

約数の個数: 20

約数和(自身を含む): 50580840

約数和(自身を除く): 28825720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 271939, 543878, 1087756, 1359695, 2175512, 2719390, 4351024, 5438780, 10877560, 21755120]

約数ペア:

[(1, 21755120), (2, 10877560), (4, 5438780), (5, 4351024), (8, 2719390), (10, 2175512), (16, 1359695), (20, 1087756), (40, 543878), (80, 271939)]