20903990

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{269}}^1\times {\mathrm{409}}^1$

素因数の和:704

約数の個数: 32

約数和(自身を含む): 39852000

約数和(自身を除く): 18948010

約数列:

[1, 2, 5, 10, 19, 38, 95, 190, 269, 409, 538, 818, 1345, 2045, 2690, 4090, 5111, 7771, 10222, 15542, 25555, 38855, 51110, 77710, 110021, 220042, 550105, 1100210, 2090399, 4180798, 10451995, 20903990]

約数ペア:

[(1, 20903990), (2, 10451995), (5, 4180798), (10, 2090399), (19, 1100210), (38, 550105), (95, 220042), (190, 110021), (269, 77710), (409, 51110), (538, 38855), (818, 25555), (1345, 15542), (2045, 10222), (2690, 7771), (4090, 5111)]