19953801

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{601}}^1$

素因数の和:662

約数の個数: 48

約数和(自身を含む): 36062208

約数和(自身を除く): 16108407

約数列:

[1, 3, 7, 9, 17, 21, 31, 51, 63, 93, 119, 153, 217, 279, 357, 527, 601, 651, 1071, 1581, 1803, 1953, 3689, 4207, 4743, 5409, 10217, 11067, 12621, 18631, 30651, 33201, 37863, 55893, 71519, 91953, 130417, 167679, 214557, 316727, 391251, 643671, 950181, 1173753, 2217089, 2850543, 6651267, 19953801]

約数ペア:

[(1, 19953801), (3, 6651267), (7, 2850543), (9, 2217089), (17, 1173753), (21, 950181), (31, 643671), (51, 391251), (63, 316727), (93, 214557), (119, 167679), (153, 130417), (217, 91953), (279, 71519), (357, 55893), (527, 37863), (601, 33201), (651, 30651), (1071, 18631), (1581, 12621), (1803, 11067), (1953, 10217), (3689, 5409), (4207, 4743)]