20986724

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{131}}^1\times {\mathrm{331}}^1$

素因数の和:488

約数の個数: 36

約数和(自身を含む): 40800144

約数和(自身を除く): 19813420

約数列:

[1, 2, 4, 11, 22, 44, 121, 131, 242, 262, 331, 484, 524, 662, 1324, 1441, 2882, 3641, 5764, 7282, 14564, 15851, 31702, 40051, 43361, 63404, 80102, 86722, 160204, 173444, 476971, 953942, 1907884, 5246681, 10493362, 20986724]

約数ペア:

[(1, 20986724), (2, 10493362), (4, 5246681), (11, 1907884), (22, 953942), (44, 476971), (121, 173444), (131, 160204), (242, 86722), (262, 80102), (331, 63404), (484, 43361), (524, 40051), (662, 31702), (1324, 15851), (1441, 14564), (2882, 7282), (3641, 5764)]