21511340

素因数分解:

$2^2\times 5^1\times {\mathrm{557}}^1\times {\mathrm{1931}}^1$

素因数の和:2497

約数の個数: 24

約数和(自身を含む): 45278352

約数和(自身を除く): 23767012

約数列:

[1, 2, 4, 5, 10, 20, 557, 1114, 1931, 2228, 2785, 3862, 5570, 7724, 9655, 11140, 19310, 38620, 1075567, 2151134, 4302268, 5377835, 10755670, 21511340]

約数ペア:

[(1, 21511340), (2, 10755670), (4, 5377835), (5, 4302268), (10, 2151134), (20, 1075567), (557, 38620), (1114, 19310), (1931, 11140), (2228, 9655), (2785, 7724), (3862, 5570)]