19739967

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{149}}^1$

素因数の和:287

約数の個数: 32

約数和(自身を含む): 29568000

約数和(自身を除く): 9828033

約数列:

[1, 3, 13, 39, 43, 79, 129, 149, 237, 447, 559, 1027, 1677, 1937, 3081, 3397, 5811, 6407, 10191, 11771, 19221, 35313, 44161, 83291, 132483, 153023, 249873, 459069, 506153, 1518459, 6579989, 19739967]

約数ペア:

[(1, 19739967), (3, 6579989), (13, 1518459), (39, 506153), (43, 459069), (79, 249873), (129, 153023), (149, 132483), (237, 83291), (447, 44161), (559, 35313), (1027, 19221), (1677, 11771), (1937, 10191), (3081, 6407), (3397, 5811)]