20380240

素因数分解:

$2^4\times 5^1\times {\mathrm{254753}}^1$

素因数の和:254766

約数の個数: 20

約数和(自身を含む): 47384244

約数和(自身を除く): 27004004

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 254753, 509506, 1019012, 1273765, 2038024, 2547530, 4076048, 5095060, 10190120, 20380240]

約数ペア:

[(1, 20380240), (2, 10190120), (4, 5095060), (5, 4076048), (8, 2547530), (10, 2038024), (16, 1273765), (20, 1019012), (40, 509506), (80, 254753)]