19510855

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{313}}^1$

素因数の和:475

約数の個数: 32

約数和(自身を含む): 29119104

約数和(自身を除く): 9608249

約数列:

[1, 5, 7, 13, 35, 65, 91, 137, 313, 455, 685, 959, 1565, 1781, 2191, 4069, 4795, 8905, 10955, 12467, 20345, 28483, 42881, 62335, 142415, 214405, 300167, 557453, 1500835, 2787265, 3902171, 19510855]

約数ペア:

[(1, 19510855), (5, 3902171), (7, 2787265), (13, 1500835), (35, 557453), (65, 300167), (91, 214405), (137, 142415), (313, 62335), (455, 42881), (685, 28483), (959, 20345), (1565, 12467), (1781, 10955), (2191, 8905), (4069, 4795)]