204142820

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{208309}}^1$

素因数の和:208332

約数の個数: 36

約数和(自身を含む): 498694140

約数和(自身を除く): 294551320

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 208309, 416618, 833236, 1041545, 1458163, 2083090, 2916326, 4166180, 5832652, 7290815, 10207141, 14581630, 20414282, 29163260, 40828564, 51035705, 102071410, 204142820]

約数ペア:

[(1, 204142820), (2, 102071410), (4, 51035705), (5, 40828564), (7, 29163260), (10, 20414282), (14, 14581630), (20, 10207141), (28, 7290815), (35, 5832652), (49, 4166180), (70, 2916326), (98, 2083090), (140, 1458163), (196, 1041545), (245, 833236), (490, 416618), (980, 208309)]