20637280

素因数分解:

$2^5\times 5^1\times {\mathrm{128983}}^1$

素因数の和:128998

約数の個数: 24

約数和(自身を含む): 48755952

約数和(自身を除く): 28118672

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 128983, 257966, 515932, 644915, 1031864, 1289830, 2063728, 2579660, 4127456, 5159320, 10318640, 20637280]

約数ペア:

[(1, 20637280), (2, 10318640), (4, 5159320), (5, 4127456), (8, 2579660), (10, 2063728), (16, 1289830), (20, 1031864), (32, 644915), (40, 515932), (80, 257966), (160, 128983)]