205428580

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{209621}}^1$

素因数の和:209644

約数の個数: 36

約数和(自身を含む): 501835068

約数和(自身を除く): 296406488

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 209621, 419242, 838484, 1048105, 1467347, 2096210, 2934694, 4192420, 5869388, 7336735, 10271429, 14673470, 20542858, 29346940, 41085716, 51357145, 102714290, 205428580]

約数ペア:

[(1, 205428580), (2, 102714290), (4, 51357145), (5, 41085716), (7, 29346940), (10, 20542858), (14, 14673470), (20, 10271429), (28, 7336735), (35, 5869388), (49, 4192420), (70, 2934694), (98, 2096210), (140, 1467347), (196, 1048105), (245, 838484), (490, 419242), (980, 209621)]