20543420

素因数分解:

$2^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{7841}}^1$

素因数の和:7981

約数の個数: 24

約数和(自身を含む): 43476048

約数和(自身を除く): 22932628

約数列:

[1, 2, 4, 5, 10, 20, 131, 262, 524, 655, 1310, 2620, 7841, 15682, 31364, 39205, 78410, 156820, 1027171, 2054342, 4108684, 5135855, 10271710, 20543420]

約数ペア:

[(1, 20543420), (2, 10271710), (4, 5135855), (5, 4108684), (10, 2054342), (20, 1027171), (131, 156820), (262, 78410), (524, 39205), (655, 31364), (1310, 15682), (2620, 7841)]