20815851

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{607}}^1$

素因数の和:711

約数の個数: 32

約数和(自身を含む): 33619968

約数和(自身を除く): 12804117

約数列:

[1, 3, 7, 21, 23, 69, 71, 161, 213, 483, 497, 607, 1491, 1633, 1821, 4249, 4899, 11431, 12747, 13961, 34293, 41883, 43097, 97727, 129291, 293181, 301679, 905037, 991231, 2973693, 6938617, 20815851]

約数ペア:

[(1, 20815851), (3, 6938617), (7, 2973693), (21, 991231), (23, 905037), (69, 301679), (71, 293181), (161, 129291), (213, 97727), (483, 43097), (497, 41883), (607, 34293), (1491, 13961), (1633, 12747), (1821, 11431), (4249, 4899)]