20121608456

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1\times {\mathrm{25541}}^1$

素因数の和:25710

約数の個数: 64

約数和(自身を含む): 40826332800

約数和(自身を除く): 20704724344

約数列:

[1, 2, 4, 8, 19, 38, 71, 73, 76, 142, 146, 152, 284, 292, 568, 584, 1349, 1387, 2698, 2774, 5183, 5396, 5548, 10366, 10792, 11096, 20732, 25541, 41464, 51082, 98477, 102164, 196954, 204328, 393908, 485279, 787816, 970558, 1813411, 1864493, 1941116, 3626822, 3728986, 3882232, 7253644, 7457972, 14507288, 14915944, 34454809, 35425367, 68909618, 70850734, 132379003, 137819236, 141701468, 264758006, 275638472, 283402936, 529516012, 1059032024, 2515201057, 5030402114, 10060804228, 20121608456]

約数ペア:

[(1, 20121608456), (2, 10060804228), (4, 5030402114), (8, 2515201057), (19, 1059032024), (38, 529516012), (71, 283402936), (73, 275638472), (76, 264758006), (142, 141701468), (146, 137819236), (152, 132379003), (284, 70850734), (292, 68909618), (568, 35425367), (584, 34454809), (1349, 14915944), (1387, 14507288), (2698, 7457972), (2774, 7253644), (5183, 3882232), (5396, 3728986), (5548, 3626822), (10366, 1941116), (10792, 1864493), (11096, 1813411), (20732, 970558), (25541, 787816), (41464, 485279), (51082, 393908), (98477, 204328), (102164, 196954)]