20880964

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1$

素因数の和:149

約数の個数: 72

約数和(自身を含む): 44271360

約数和(自身を除く): 23390396

約数列:

[1, 2, 4, 13, 17, 23, 26, 34, 46, 52, 68, 79, 92, 158, 169, 221, 299, 316, 338, 391, 442, 598, 676, 782, 884, 1027, 1196, 1343, 1564, 1817, 2054, 2686, 2873, 3634, 3887, 4108, 5083, 5372, 5746, 7268, 7774, 10166, 11492, 13351, 15548, 17459, 20332, 23621, 26702, 30889, 34918, 47242, 53404, 61778, 66079, 69836, 94484, 123556, 132158, 226967, 264316, 307073, 401557, 453934, 614146, 803114, 907868, 1228292, 1606228, 5220241, 10440482, 20880964]

約数ペア:

[(1, 20880964), (2, 10440482), (4, 5220241), (13, 1606228), (17, 1228292), (23, 907868), (26, 803114), (34, 614146), (46, 453934), (52, 401557), (68, 307073), (79, 264316), (92, 226967), (158, 132158), (169, 123556), (221, 94484), (299, 69836), (316, 66079), (338, 61778), (391, 53404), (442, 47242), (598, 34918), (676, 30889), (782, 26702), (884, 23621), (1027, 20332), (1196, 17459), (1343, 15548), (1564, 13351), (1817, 11492), (2054, 10166), (2686, 7774), (2873, 7268), (3634, 5746), (3887, 5372), (4108, 5083)]