20861451

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{79}}^1$

素因数の和:196

約数の個数: 48

約数和(自身を含む): 34303360

約数和(自身を除く): 13441909

約数列:

[1, 3, 9, 13, 37, 39, 61, 79, 111, 117, 183, 237, 333, 481, 549, 711, 793, 1027, 1443, 2257, 2379, 2923, 3081, 4329, 4819, 6771, 7137, 8769, 9243, 14457, 20313, 26307, 29341, 37999, 43371, 62647, 88023, 113997, 178303, 187941, 264069, 341991, 534909, 563823, 1604727, 2317939, 6953817, 20861451]

約数ペア:

[(1, 20861451), (3, 6953817), (9, 2317939), (13, 1604727), (37, 563823), (39, 534909), (61, 341991), (79, 264069), (111, 187941), (117, 178303), (183, 113997), (237, 88023), (333, 62647), (481, 43371), (549, 37999), (711, 29341), (793, 26307), (1027, 20313), (1443, 14457), (2257, 9243), (2379, 8769), (2923, 7137), (3081, 6771), (4329, 4819)]