2178351

素因数分解:

$3^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{487}}^1$

素因数の和:571

約数の個数: 24

約数和(自身を含む): 3654144

約数和(自身を除く): 1475793

約数列:

[1, 3, 7, 9, 21, 63, 71, 213, 487, 497, 639, 1461, 1491, 3409, 4383, 4473, 10227, 30681, 34577, 103731, 242039, 311193, 726117, 2178351]

約数ペア:

[(1, 2178351), (3, 726117), (7, 311193), (9, 242039), (21, 103731), (63, 34577), (71, 30681), (213, 10227), (487, 4473), (497, 4383), (639, 3409), (1461, 1491)]