21139191

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{463}}^1$

素因数の和:580

約数の個数: 32

約数和(自身を含む): 33408000

約数和(自身を除く): 12268809

約数列:

[1, 3, 9, 19, 27, 57, 89, 171, 267, 463, 513, 801, 1389, 1691, 2403, 4167, 5073, 8797, 12501, 15219, 26391, 41207, 45657, 79173, 123621, 237519, 370863, 782933, 1112589, 2348799, 7046397, 21139191]

約数ペア:

[(1, 21139191), (3, 7046397), (9, 2348799), (19, 1112589), (27, 782933), (57, 370863), (89, 237519), (171, 123621), (267, 79173), (463, 45657), (513, 41207), (801, 26391), (1389, 15219), (1691, 12501), (2403, 8797), (4167, 5073)]