21948591

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{55009}}^1$

素因数の和:55038

約数の個数: 16

約数和(自身を含む): 35206400

約数和(自身を除く): 13257809

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 55009, 165027, 385063, 1045171, 1155189, 3135513, 7316197, 21948591]

約数ペア:

[(1, 21948591), (3, 7316197), (7, 3135513), (19, 1155189), (21, 1045171), (57, 385063), (133, 165027), (399, 55009)]