12899420

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{15731}}^1$

素因数の和:15781

約数の個数: 24

約数和(自身を含む): 27751248

約数和(自身を除く): 14851828

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 15731, 31462, 62924, 78655, 157310, 314620, 644971, 1289942, 2579884, 3224855, 6449710, 12899420]

約数ペア:

[(1, 12899420), (2, 6449710), (4, 3224855), (5, 2579884), (10, 1289942), (20, 644971), (41, 314620), (82, 157310), (164, 78655), (205, 62924), (410, 31462), (820, 15731)]