21042177

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{389}}^1$

素因数の和:497

約数の個数: 32

約数和(自身を含む): 32323200

約数和(自身を除く): 11281023

約数列:

[1, 3, 13, 19, 39, 57, 73, 219, 247, 389, 741, 949, 1167, 1387, 2847, 4161, 5057, 7391, 15171, 18031, 22173, 28397, 54093, 85191, 96083, 288249, 369161, 539543, 1107483, 1618629, 7014059, 21042177]

約数ペア:

[(1, 21042177), (3, 7014059), (13, 1618629), (19, 1107483), (39, 539543), (57, 369161), (73, 288249), (219, 96083), (247, 85191), (389, 54093), (741, 28397), (949, 22173), (1167, 18031), (1387, 15171), (2847, 7391), (4161, 5057)]