81991966

素因数分解:

$2^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{173}}^1\times {\mathrm{349}}^1$

素因数の和:628

約数の個数: 32

約数和(自身を含む): 143236800

約数和(自身を除く): 61244834

約数列:

[1, 2, 7, 14, 97, 173, 194, 346, 349, 679, 698, 1211, 1358, 2422, 2443, 4886, 16781, 33562, 33853, 60377, 67706, 117467, 120754, 234934, 236971, 422639, 473942, 845278, 5856569, 11713138, 40995983, 81991966]

約数ペア:

[(1, 81991966), (2, 40995983), (7, 11713138), (14, 5856569), (97, 845278), (173, 473942), (194, 422639), (346, 236971), (349, 234934), (679, 120754), (698, 117467), (1211, 67706), (1358, 60377), (2422, 33853), (2443, 33562), (4886, 16781)]