21000317751

素因数分解:

$3^2\times 7^1\times {\mathrm{59}}^1\times {\mathrm{227}}^1\times {\mathrm{24889}}^1$

素因数の和:25188

約数の個数: 48

約数和(自身を含む): 35411500800

約数和(自身を除く): 14411183049

約数列:

[1, 3, 7, 9, 21, 59, 63, 177, 227, 413, 531, 681, 1239, 1589, 2043, 3717, 4767, 13393, 14301, 24889, 40179, 74667, 93751, 120537, 174223, 224001, 281253, 522669, 843759, 1468451, 1568007, 4405353, 5649803, 10279157, 13216059, 16949409, 30837471, 39548621, 50848227, 92512413, 118645863, 333338377, 355937589, 1000015131, 2333368639, 3000045393, 7000105917, 21000317751]

約数ペア:

[(1, 21000317751), (3, 7000105917), (7, 3000045393), (9, 2333368639), (21, 1000015131), (59, 355937589), (63, 333338377), (177, 118645863), (227, 92512413), (413, 50848227), (531, 39548621), (681, 30837471), (1239, 16949409), (1589, 13216059), (2043, 10279157), (3717, 5649803), (4767, 4405353), (13393, 1568007), (14301, 1468451), (24889, 843759), (40179, 522669), (74667, 281253), (93751, 224001), (120537, 174223)]