21000974379

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{223}}^1\times {\mathrm{499}}^1$

素因数の和:805

約数の個数: 128

約数和(自身を含む): 37847040000

約数和(自身を除く): 16846065621

約数列:

[1, 3, 7, 11, 19, 21, 33, 43, 57, 77, 129, 133, 209, 223, 231, 301, 399, 473, 499, 627, 669, 817, 903, 1419, 1463, 1497, 1561, 2451, 2453, 3311, 3493, 4237, 4389, 4683, 5489, 5719, 7359, 8987, 9481, 9589, 9933, 10479, 12711, 16467, 17157, 17171, 21457, 26961, 28443, 28767, 29659, 38423, 46607, 51513, 62909, 64371, 66367, 67123, 88977, 104291, 105479, 111277, 115269, 139821, 150199, 182191, 188727, 199101, 201369, 236027, 312873, 316437, 326249, 333831, 407683, 450597, 546573, 708081, 730037, 738353, 778939, 978747, 1223049, 1224047, 1275337, 1652189, 2004101, 2114263, 2190111, 2215059, 2336817, 2853781, 3672141, 3826011, 4484513, 4784911, 4956567, 6012303, 6342789, 8561343, 8568329, 13453539, 14028707, 14354733, 14799841, 23256893, 25704987, 31391591, 33494377, 42086121, 44399523, 52634021, 69770679, 90913309, 94174773, 100483131, 157902063, 162798251, 272739927, 368438147, 488394753, 636393163, 1000046399, 1105314441, 1909179489, 3000139197, 7000324793, 21000974379]

約数ペア:

[(1, 21000974379), (3, 7000324793), (7, 3000139197), (11, 1909179489), (19, 1105314441), (21, 1000046399), (33, 636393163), (43, 488394753), (57, 368438147), (77, 272739927), (129, 162798251), (133, 157902063), (209, 100483131), (223, 94174773), (231, 90913309), (301, 69770679), (399, 52634021), (473, 44399523), (499, 42086121), (627, 33494377), (669, 31391591), (817, 25704987), (903, 23256893), (1419, 14799841), (1463, 14354733), (1497, 14028707), (1561, 13453539), (2451, 8568329), (2453, 8561343), (3311, 6342789), (3493, 6012303), (4237, 4956567), (4389, 4784911), (4683, 4484513), (5489, 3826011), (5719, 3672141), (7359, 2853781), (8987, 2336817), (9481, 2215059), (9589, 2190111), (9933, 2114263), (10479, 2004101), (12711, 1652189), (16467, 1275337), (17157, 1224047), (17171, 1223049), (21457, 978747), (26961, 778939), (28443, 738353), (28767, 730037), (29659, 708081), (38423, 546573), (46607, 450597), (51513, 407683), (62909, 333831), (64371, 326249), (66367, 316437), (67123, 312873), (88977, 236027), (104291, 201369), (105479, 199101), (111277, 188727), (115269, 182191), (139821, 150199)]