21903453

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1$

素因数の和:128

約数の個数: 80

約数和(自身を含む): 40330752

約数和(自身を除く): 18427299

約数列:

[1, 3, 9, 11, 13, 27, 31, 33, 39, 61, 81, 93, 99, 117, 143, 183, 279, 297, 341, 351, 403, 429, 549, 671, 793, 837, 891, 1023, 1053, 1209, 1287, 1647, 1891, 2013, 2379, 2511, 3069, 3627, 3861, 4433, 4941, 5673, 6039, 7137, 8723, 9207, 10881, 11583, 13299, 17019, 18117, 20801, 21411, 24583, 26169, 27621, 32643, 39897, 51057, 54351, 62403, 64233, 73749, 78507, 119691, 153171, 187209, 221247, 235521, 270413, 359073, 561627, 663741, 706563, 811239, 1684881, 1991223, 2433717, 7301151, 21903453]

約数ペア:

[(1, 21903453), (3, 7301151), (9, 2433717), (11, 1991223), (13, 1684881), (27, 811239), (31, 706563), (33, 663741), (39, 561627), (61, 359073), (81, 270413), (93, 235521), (99, 221247), (117, 187209), (143, 153171), (183, 119691), (279, 78507), (297, 73749), (341, 64233), (351, 62403), (403, 54351), (429, 51057), (549, 39897), (671, 32643), (793, 27621), (837, 26169), (891, 24583), (1023, 21411), (1053, 20801), (1209, 18117), (1287, 17019), (1647, 13299), (1891, 11583), (2013, 10881), (2379, 9207), (2511, 8723), (3069, 7137), (3627, 6039), (3861, 5673), (4433, 4941)]