642978505

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{311}}^1\times {\mathrm{1871}}^1$

素因数の和:2217

約数の個数: 32

約数和(自身を含む): 883104768

約数和(自身を除く): 240126263

約数列:

[1, 5, 13, 17, 65, 85, 221, 311, 1105, 1555, 1871, 4043, 5287, 9355, 20215, 24323, 26435, 31807, 68731, 121615, 159035, 343655, 413491, 581881, 2067455, 2909405, 7564453, 9891977, 37822265, 49459885, 128595701, 642978505]

約数ペア:

[(1, 642978505), (5, 128595701), (13, 49459885), (17, 37822265), (65, 9891977), (85, 7564453), (221, 2909405), (311, 2067455), (1105, 581881), (1555, 413491), (1871, 343655), (4043, 159035), (5287, 121615), (9355, 68731), (20215, 31807), (24323, 26435)]