19791395

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{97}}^1$

素因数の和:231

約数の個数: 32

約数和(自身を含む): 26803392

約数和(自身を除く): 7011997

約数列:

[1, 5, 13, 43, 65, 73, 97, 215, 365, 485, 559, 949, 1261, 2795, 3139, 4171, 4745, 6305, 7081, 15695, 20855, 35405, 40807, 54223, 92053, 204035, 271115, 304483, 460265, 1522415, 3958279, 19791395]

約数ペア:

[(1, 19791395), (5, 3958279), (13, 1522415), (43, 460265), (65, 304483), (73, 271115), (97, 204035), (215, 92053), (365, 54223), (485, 40807), (559, 35405), (949, 20855), (1261, 15695), (2795, 7081), (3139, 6305), (4171, 4745)]