19678857

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{227}}^1$

素因数の和:349

約数の個数: 32

約数和(自身を含む): 29942784

約数和(自身を除く): 10263927

約数列:

[1, 3, 11, 33, 37, 71, 111, 213, 227, 407, 681, 781, 1221, 2343, 2497, 2627, 7491, 7881, 8399, 16117, 25197, 28897, 48351, 86691, 92389, 177287, 277167, 531861, 596329, 1788987, 6559619, 19678857]

約数ペア:

[(1, 19678857), (3, 6559619), (11, 1788987), (33, 596329), (37, 531861), (71, 277167), (111, 177287), (213, 92389), (227, 86691), (407, 48351), (681, 28897), (781, 25197), (1221, 16117), (2343, 8399), (2497, 7881), (2627, 7491)]