21565551

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{54049}}^1$

素因数の和:54078

約数の個数: 16

約数和(自身を含む): 34592000

約数和(自身を除く): 13026449

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 54049, 162147, 378343, 1026931, 1135029, 3080793, 7188517, 21565551]

約数ペア:

[(1, 21565551), (3, 7188517), (7, 3080793), (19, 1135029), (21, 1026931), (57, 378343), (133, 162147), (399, 54049)]