19894820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{8221}}^1$

素因数の和:8252

約数の個数: 36

約数和(自身を含む): 45928092

約数和(自身を除く): 26033272

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 1210, 2420, 8221, 16442, 32884, 41105, 82210, 90431, 164420, 180862, 361724, 452155, 904310, 994741, 1808620, 1989482, 3978964, 4973705, 9947410, 19894820]

約数ペア:

[(1, 19894820), (2, 9947410), (4, 4973705), (5, 3978964), (10, 1989482), (11, 1808620), (20, 994741), (22, 904310), (44, 452155), (55, 361724), (110, 180862), (121, 164420), (220, 90431), (242, 82210), (484, 41105), (605, 32884), (1210, 16442), (2420, 8221)]