20911220

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{8641}}^1$

素因数の和:8672

約数の個数: 36

約数和(自身を含む): 48274212

約数和(自身を除く): 27362992

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 1210, 2420, 8641, 17282, 34564, 43205, 86410, 95051, 172820, 190102, 380204, 475255, 950510, 1045561, 1901020, 2091122, 4182244, 5227805, 10455610, 20911220]

約数ペア:

[(1, 20911220), (2, 10455610), (4, 5227805), (5, 4182244), (10, 2091122), (11, 1901020), (20, 1045561), (22, 950510), (44, 475255), (55, 380204), (110, 190102), (121, 172820), (220, 95051), (242, 86410), (484, 43205), (605, 34564), (1210, 17282), (2420, 8641)]