18913401

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{257}}^1$

素因数の和:330

約数の個数: 48

約数和(自身を含む): 32117904

約数和(自身を除く): 13204503

約数列:

[1, 3, 9, 13, 17, 37, 39, 51, 111, 117, 153, 221, 257, 333, 481, 629, 663, 771, 1443, 1887, 1989, 2313, 3341, 4329, 4369, 5661, 8177, 9509, 10023, 13107, 24531, 28527, 30069, 39321, 56797, 73593, 85581, 123617, 161653, 170391, 370851, 484959, 511173, 1112553, 1454877, 2101489, 6304467, 18913401]

約数ペア:

[(1, 18913401), (3, 6304467), (9, 2101489), (13, 1454877), (17, 1112553), (37, 511173), (39, 484959), (51, 370851), (111, 170391), (117, 161653), (153, 123617), (221, 85581), (257, 73593), (333, 56797), (481, 39321), (629, 30069), (663, 28527), (771, 24531), (1443, 13107), (1887, 10023), (1989, 9509), (2313, 8177), (3341, 5661), (4329, 4369)]