640250471

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{163}}^1\times {\mathrm{787}}^1$

素因数の和:1011

約数の個数: 32

約数和(自身を含む): 794001408

約数和(自身を除く): 153750937

約数列:

[1, 7, 23, 31, 161, 163, 217, 713, 787, 1141, 3749, 4991, 5053, 5509, 18101, 24397, 26243, 35371, 116219, 126707, 128281, 170779, 561131, 813533, 897967, 2950463, 3927917, 3976711, 20653241, 27836977, 91464353, 640250471]

約数ペア:

[(1, 640250471), (7, 91464353), (23, 27836977), (31, 20653241), (161, 3976711), (163, 3927917), (217, 2950463), (713, 897967), (787, 813533), (1141, 561131), (3749, 170779), (4991, 128281), (5053, 126707), (5509, 116219), (18101, 35371), (24397, 26243)]