19968455

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{1063}}^1$

素因数の和:1115

約数の個数: 24

約数和(自身を含む): 27438432

約数和(自身を除く): 7469977

約数列:

[1, 5, 13, 17, 65, 85, 221, 289, 1063, 1105, 1445, 3757, 5315, 13819, 18071, 18785, 69095, 90355, 234923, 307207, 1174615, 1536035, 3993691, 19968455]

約数ペア:

[(1, 19968455), (5, 3993691), (13, 1536035), (17, 1174615), (65, 307207), (85, 234923), (221, 90355), (289, 69095), (1063, 18785), (1105, 18071), (1445, 13819), (3757, 5315)]