21398488

素因数分解:

$2^3\times {\mathrm{331}}^1\times {\mathrm{8081}}^1$

素因数の和:8418

約数の個数: 16

約数和(自身を含む): 40248360

約数和(自身を除く): 18849872

約数列:

[1, 2, 4, 8, 331, 662, 1324, 2648, 8081, 16162, 32324, 64648, 2674811, 5349622, 10699244, 21398488]

約数ペア:

[(1, 21398488), (2, 10699244), (4, 5349622), (8, 2674811), (331, 64648), (662, 32324), (1324, 16162), (2648, 8081)]