21149320

素因数分解:

$2^3\times 5^1\times {\mathrm{223}}^1\times {\mathrm{2371}}^1$

素因数の和:2605

約数の個数: 32

約数和(自身を含む): 47819520

約数和(自身を除く): 26670200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 223, 446, 892, 1115, 1784, 2230, 2371, 4460, 4742, 8920, 9484, 11855, 18968, 23710, 47420, 94840, 528733, 1057466, 2114932, 2643665, 4229864, 5287330, 10574660, 21149320]

約数ペア:

[(1, 21149320), (2, 10574660), (4, 5287330), (5, 4229864), (8, 2643665), (10, 2114932), (20, 1057466), (40, 528733), (223, 94840), (446, 47420), (892, 23710), (1115, 18968), (1784, 11855), (2230, 9484), (2371, 8920), (4460, 4742)]