21000337480

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^3\times {\mathrm{76543}}^1$

素因数の和:76611

約数の個数: 64

約数和(自身を含む): 49876070400

約数和(自身を除く): 28875732920

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 361, 380, 722, 760, 1444, 1805, 2888, 3610, 6859, 7220, 13718, 14440, 27436, 34295, 54872, 68590, 76543, 137180, 153086, 274360, 306172, 382715, 612344, 765430, 1454317, 1530860, 2908634, 3061720, 5817268, 7271585, 11634536, 14543170, 27632023, 29086340, 55264046, 58172680, 110528092, 138160115, 221056184, 276320230, 525008437, 552640460, 1050016874, 1105280920, 2100033748, 2625042185, 4200067496, 5250084370, 10500168740, 21000337480]

約数ペア:

[(1, 21000337480), (2, 10500168740), (4, 5250084370), (5, 4200067496), (8, 2625042185), (10, 2100033748), (19, 1105280920), (20, 1050016874), (38, 552640460), (40, 525008437), (76, 276320230), (95, 221056184), (152, 138160115), (190, 110528092), (361, 58172680), (380, 55264046), (722, 29086340), (760, 27632023), (1444, 14543170), (1805, 11634536), (2888, 7271585), (3610, 5817268), (6859, 3061720), (7220, 2908634), (13718, 1530860), (14440, 1454317), (27436, 765430), (34295, 612344), (54872, 382715), (68590, 306172), (76543, 274360), (137180, 153086)]