12978905

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{67}}^1$

素因数の和:185

約数の個数: 32

約数和(自身を含む): 17449344

約数和(自身を除く): 4470439

約数列:

[1, 5, 17, 43, 53, 67, 85, 215, 265, 335, 731, 901, 1139, 2279, 2881, 3551, 3655, 4505, 5695, 11395, 14405, 17755, 38743, 48977, 60367, 152693, 193715, 244885, 301835, 763465, 2595781, 12978905]

約数ペア:

[(1, 12978905), (5, 2595781), (17, 763465), (43, 301835), (53, 244885), (67, 193715), (85, 152693), (215, 60367), (265, 48977), (335, 38743), (731, 17755), (901, 14405), (1139, 11395), (2279, 5695), (2881, 4505), (3551, 3655)]