21216939

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{5099}}^1$

素因数の和:5194

約数の個数: 16

約数和(自身を含む): 30192000

約数和(自身を除く): 8975061

約数列:

[1, 3, 19, 57, 73, 219, 1387, 4161, 5099, 15297, 96881, 290643, 372227, 1116681, 7072313, 21216939]

約数ペア:

[(1, 21216939), (3, 7072313), (19, 1116681), (57, 372227), (73, 290643), (219, 96881), (1387, 15297), (4161, 5099)]