19945555

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^2\times {\mathrm{593}}^1$

素因数の和:667

約数の個数: 24

約数和(自身を含む): 28312416

約数和(自身を除く): 8366861

約数列:

[1, 5, 7, 31, 35, 155, 217, 593, 961, 1085, 2965, 4151, 4805, 6727, 18383, 20755, 33635, 91915, 128681, 569873, 643405, 2849365, 3989111, 19945555]

約数ペア:

[(1, 19945555), (5, 3989111), (7, 2849365), (31, 643405), (35, 569873), (155, 128681), (217, 91915), (593, 33635), (961, 20755), (1085, 18383), (2965, 6727), (4151, 4805)]