21351155

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{331}}^1$

素因数の和:459

約数の個数: 32

約数和(自身を含む): 31234560

約数和(自身を除く): 9883405

約数列:

[1, 5, 7, 19, 35, 95, 97, 133, 331, 485, 665, 679, 1655, 1843, 2317, 3395, 6289, 9215, 11585, 12901, 31445, 32107, 44023, 64505, 160535, 220115, 224749, 610033, 1123745, 3050165, 4270231, 21351155]

約数ペア:

[(1, 21351155), (5, 4270231), (7, 3050165), (19, 1123745), (35, 610033), (95, 224749), (97, 220115), (133, 160535), (331, 64505), (485, 44023), (665, 32107), (679, 31445), (1655, 12901), (1843, 11585), (2317, 9215), (3395, 6289)]