20171978211

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{6991}}^1\times {\mathrm{12491}}^1$

素因数の和:19503

約数の個数: 32

約数和(自身を含む): 33540120576

約数和(自身を除く): 13368142365

約数列:

[1, 3, 7, 11, 21, 33, 77, 231, 6991, 12491, 20973, 37473, 48937, 76901, 87437, 137401, 146811, 230703, 262311, 412203, 538307, 961807, 1614921, 2885421, 87324581, 261973743, 611272067, 960570391, 1833816201, 2881711173, 6723992737, 20171978211]

約数ペア:

[(1, 20171978211), (3, 6723992737), (7, 2881711173), (11, 1833816201), (21, 960570391), (33, 611272067), (77, 261973743), (231, 87324581), (6991, 2885421), (12491, 1614921), (20973, 961807), (37473, 538307), (48937, 412203), (76901, 262311), (87437, 230703), (137401, 146811)]