81690861

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{3863}}^1$

素因数の和:3945

約数の個数: 32

約数和(自身を含む): 133539840

約数和(自身を除く): 51848979

約数列:

[1, 3, 7, 19, 21, 53, 57, 133, 159, 371, 399, 1007, 1113, 3021, 3863, 7049, 11589, 21147, 27041, 73397, 81123, 204739, 220191, 513779, 614217, 1433173, 1541337, 3890041, 4299519, 11670123, 27230287, 81690861]

約数ペア:

[(1, 81690861), (3, 27230287), (7, 11670123), (19, 4299519), (21, 3890041), (53, 1541337), (57, 1433173), (133, 614217), (159, 513779), (371, 220191), (399, 204739), (1007, 81123), (1113, 73397), (3021, 27041), (3863, 21147), (7049, 11589)]