20121557764

素因数分解:

$2^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{491201}}^1$

素因数の和:491249

約数の個数: 72

約数和(自身を含む): 47037503520

約数和(自身を除く): 26915945756

約数列:

[1, 2, 4, 7, 11, 14, 19, 22, 28, 38, 44, 49, 76, 77, 98, 133, 154, 196, 209, 266, 308, 418, 532, 539, 836, 931, 1078, 1463, 1862, 2156, 2926, 3724, 5852, 10241, 20482, 40964, 491201, 982402, 1964804, 3438407, 5403211, 6876814, 9332819, 10806422, 13753628, 18665638, 21612844, 24068849, 37331276, 37822477, 48137698, 65329733, 75644954, 96275396, 102661009, 130659466, 151289908, 205322018, 261318932, 264757339, 410644036, 457308131, 529514678, 718627063, 914616262, 1059029356, 1437254126, 1829232524, 2874508252, 5030389441, 10060778882, 20121557764]

約数ペア:

[(1, 20121557764), (2, 10060778882), (4, 5030389441), (7, 2874508252), (11, 1829232524), (14, 1437254126), (19, 1059029356), (22, 914616262), (28, 718627063), (38, 529514678), (44, 457308131), (49, 410644036), (76, 264757339), (77, 261318932), (98, 205322018), (133, 151289908), (154, 130659466), (196, 102661009), (209, 96275396), (266, 75644954), (308, 65329733), (418, 48137698), (532, 37822477), (539, 37331276), (836, 24068849), (931, 21612844), (1078, 18665638), (1463, 13753628), (1862, 10806422), (2156, 9332819), (2926, 6876814), (3724, 5403211), (5852, 3438407), (10241, 1964804), (20482, 982402), (40964, 491201)]