21151539

素因数分解:

$3^2\times {\mathrm{71}}^1\times {\mathrm{79}}^1\times {\mathrm{419}}^1$

素因数の和:575

約数の個数: 24

約数和(自身を含む): 31449600

約数和(自身を除く): 10298061

約数列:

[1, 3, 9, 71, 79, 213, 237, 419, 639, 711, 1257, 3771, 5609, 16827, 29749, 33101, 50481, 89247, 99303, 267741, 297909, 2350171, 7050513, 21151539]

約数ペア:

[(1, 21151539), (3, 7050513), (9, 2350171), (71, 297909), (79, 267741), (213, 99303), (237, 89247), (419, 50481), (639, 33101), (711, 29749), (1257, 16827), (3771, 5609)]