19978548

素因数分解:

$2^2\times 3^1\times {\mathrm{71}}^1\times {\mathrm{131}}^1\times {\mathrm{179}}^1$

素因数の和:388

約数の個数: 48

約数和(自身を含む): 47900160

約数和(自身を除く): 27921612

約数列:

[1, 2, 3, 4, 6, 12, 71, 131, 142, 179, 213, 262, 284, 358, 393, 426, 524, 537, 716, 786, 852, 1074, 1572, 2148, 9301, 12709, 18602, 23449, 25418, 27903, 37204, 38127, 46898, 50836, 55806, 70347, 76254, 93796, 111612, 140694, 152508, 281388, 1664879, 3329758, 4994637, 6659516, 9989274, 19978548]

約数ペア:

[(1, 19978548), (2, 9989274), (3, 6659516), (4, 4994637), (6, 3329758), (12, 1664879), (71, 281388), (131, 152508), (142, 140694), (179, 111612), (213, 93796), (262, 76254), (284, 70347), (358, 55806), (393, 50836), (426, 46898), (524, 38127), (537, 37204), (716, 27903), (786, 25418), (852, 23449), (1074, 18602), (1572, 12709), (2148, 9301)]