20004813

素因数分解:

$3^4\times {\mathrm{491}}^1\times {\mathrm{503}}^1$

素因数の和:1006

約数の個数: 20

約数和(自身を含む): 30004128

約数和(自身を除く): 9999315

約数列:

[1, 3, 9, 27, 81, 491, 503, 1473, 1509, 4419, 4527, 13257, 13581, 39771, 40743, 246973, 740919, 2222757, 6668271, 20004813]

約数ペア:

[(1, 20004813), (3, 6668271), (9, 2222757), (27, 740919), (81, 246973), (491, 40743), (503, 39771), (1473, 13581), (1509, 13257), (4419, 4527)]