19978191

素因数分解:

$3^3\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{607}}^1$

素因数の和:692

約数の個数: 32

約数和(自身を含む): 31518720

約数和(自身を除く): 11540529

約数列:

[1, 3, 9, 23, 27, 53, 69, 159, 207, 477, 607, 621, 1219, 1431, 1821, 3657, 5463, 10971, 13961, 16389, 32171, 32913, 41883, 96513, 125649, 289539, 376947, 739933, 868617, 2219799, 6659397, 19978191]

約数ペア:

[(1, 19978191), (3, 6659397), (9, 2219799), (23, 868617), (27, 739933), (53, 376947), (69, 289539), (159, 125649), (207, 96513), (477, 41883), (607, 32913), (621, 32171), (1219, 16389), (1431, 13961), (1821, 10971), (3657, 5463)]