15721961787

素因数分解:

$3^3\times 7^2\times {\mathrm{19}}^1\times {\mathrm{625451}}^1$

素因数の和:625493

約数の個数: 48

約数和(自身を含む): 28520611200

約数和(自身を除く): 12798649413

約数列:

[1, 3, 7, 9, 19, 21, 27, 49, 57, 63, 133, 147, 171, 189, 399, 441, 513, 931, 1197, 1323, 2793, 3591, 8379, 25137, 625451, 1876353, 4378157, 5629059, 11883569, 13134471, 16887177, 30647099, 35650707, 39403413, 83184983, 91941297, 106952121, 118210239, 249554949, 275823891, 320856363, 582294881, 748664847, 827471673, 1746884643, 2245994541, 5240653929, 15721961787]

約数ペア:

[(1, 15721961787), (3, 5240653929), (7, 2245994541), (9, 1746884643), (19, 827471673), (21, 748664847), (27, 582294881), (49, 320856363), (57, 275823891), (63, 249554949), (133, 118210239), (147, 106952121), (171, 91941297), (189, 83184983), (399, 39403413), (441, 35650707), (513, 30647099), (931, 16887177), (1197, 13134471), (1323, 11883569), (2793, 5629059), (3591, 4378157), (8379, 1876353), (25137, 625451)]