21112705

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{107}}^1$

素因数の和:229

約数の個数: 32

約数和(自身を含む): 28200960

約数和(自身を除く): 7088255

約数列:

[1, 5, 19, 31, 67, 95, 107, 155, 335, 535, 589, 1273, 2033, 2077, 2945, 3317, 6365, 7169, 10165, 10385, 16585, 35845, 39463, 63023, 136211, 197315, 222239, 315115, 681055, 1111195, 4222541, 21112705]

約数ペア:

[(1, 21112705), (5, 4222541), (19, 1111195), (31, 681055), (67, 315115), (95, 222239), (107, 197315), (155, 136211), (335, 63023), (535, 39463), (589, 35845), (1273, 16585), (2033, 10385), (2077, 10165), (2945, 7169), (3317, 6365)]