20385465

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{79943}}^1$

素因数の和:79968

約数の個数: 16

約数和(自身を含む): 34535808

約数和(自身を除く): 14150343

約数列:

[1, 3, 5, 15, 17, 51, 85, 255, 79943, 239829, 399715, 1199145, 1359031, 4077093, 6795155, 20385465]

約数ペア:

[(1, 20385465), (3, 6795155), (5, 4077093), (15, 1359031), (17, 1199145), (51, 399715), (85, 239829), (255, 79943)]