81706821

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{4357}}^1$

素因数の和:4433

約数の個数: 32

約数和(自身を含む): 133877760

約数和(自身を除く): 52170939

約数列:

[1, 3, 7, 19, 21, 47, 57, 133, 141, 329, 399, 893, 987, 2679, 4357, 6251, 13071, 18753, 30499, 82783, 91497, 204779, 248349, 579481, 614337, 1433453, 1738443, 3890801, 4300359, 11672403, 27235607, 81706821]

約数ペア:

[(1, 81706821), (3, 27235607), (7, 11672403), (19, 4300359), (21, 3890801), (47, 1738443), (57, 1433453), (133, 614337), (141, 579481), (329, 248349), (399, 204779), (893, 91497), (987, 82783), (2679, 30499), (4357, 18753), (6251, 13071)]