19921688

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{37}}^2\times {\mathrm{107}}^1$

素因数の和:204

約数の個数: 48

約数和(自身を含む): 41028120

約数和(自身を除く): 21106432

約数列:

[1, 2, 4, 8, 17, 34, 37, 68, 74, 107, 136, 148, 214, 296, 428, 629, 856, 1258, 1369, 1819, 2516, 2738, 3638, 3959, 5032, 5476, 7276, 7918, 10952, 14552, 15836, 23273, 31672, 46546, 67303, 93092, 134606, 146483, 186184, 269212, 292966, 538424, 585932, 1171864, 2490211, 4980422, 9960844, 19921688]

約数ペア:

[(1, 19921688), (2, 9960844), (4, 4980422), (8, 2490211), (17, 1171864), (34, 585932), (37, 538424), (68, 292966), (74, 269212), (107, 186184), (136, 146483), (148, 134606), (214, 93092), (296, 67303), (428, 46546), (629, 31672), (856, 23273), (1258, 15836), (1369, 14552), (1819, 10952), (2516, 7918), (2738, 7276), (3638, 5476), (3959, 5032)]