20971899

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{149}}^1\times {\mathrm{401}}^1$

素因数の和:572

約数の個数: 32

約数和(自身を含む): 33768000

約数和(自身を除く): 12796101

約数列:

[1, 3, 9, 13, 27, 39, 117, 149, 351, 401, 447, 1203, 1341, 1937, 3609, 4023, 5213, 5811, 10827, 15639, 17433, 46917, 52299, 59749, 140751, 179247, 537741, 776737, 1613223, 2330211, 6990633, 20971899]

約数ペア:

[(1, 20971899), (3, 6990633), (9, 2330211), (13, 1613223), (27, 776737), (39, 537741), (117, 179247), (149, 140751), (351, 59749), (401, 52299), (447, 46917), (1203, 17433), (1341, 15639), (1937, 10827), (3609, 5811), (4023, 5213)]