19780197

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{137}}^1\times {\mathrm{149}}^1$

素因数の和:325

約数の個数: 32

約数和(自身を含む): 29808000

約数和(自身を除く): 10027803

約数列:

[1, 3, 17, 19, 51, 57, 137, 149, 323, 411, 447, 969, 2329, 2533, 2603, 2831, 6987, 7599, 7809, 8493, 20413, 44251, 48127, 61239, 132753, 144381, 347021, 387847, 1041063, 1163541, 6593399, 19780197]

約数ペア:

[(1, 19780197), (3, 6593399), (17, 1163541), (19, 1041063), (51, 387847), (57, 347021), (137, 144381), (149, 132753), (323, 61239), (411, 48127), (447, 44251), (969, 20413), (2329, 8493), (2533, 7809), (2603, 7599), (2831, 6987)]