20392820

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{20809}}^1$

素因数の和:20832

約数の個数: 36

約数和(自身を含む): 49819140

約数和(自身を除く): 29426320

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 20809, 41618, 83236, 104045, 145663, 208090, 291326, 416180, 582652, 728315, 1019641, 1456630, 2039282, 2913260, 4078564, 5098205, 10196410, 20392820]

約数ペア:

[(1, 20392820), (2, 10196410), (4, 5098205), (5, 4078564), (7, 2913260), (10, 2039282), (14, 1456630), (20, 1019641), (28, 728315), (35, 582652), (49, 416180), (70, 291326), (98, 208090), (140, 145663), (196, 104045), (245, 83236), (490, 41618), (980, 20809)]