21161440

素因数分解:

$2^5\times 5^1\times {\mathrm{19}}^1\times {\mathrm{6961}}^1$

素因数の和:6995

約数の個数: 48

約数和(自身を含む): 52632720

約数和(自身を除く): 31471280

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 76, 80, 95, 152, 160, 190, 304, 380, 608, 760, 1520, 3040, 6961, 13922, 27844, 34805, 55688, 69610, 111376, 132259, 139220, 222752, 264518, 278440, 529036, 556880, 661295, 1058072, 1113760, 1322590, 2116144, 2645180, 4232288, 5290360, 10580720, 21161440]

約数ペア:

[(1, 21161440), (2, 10580720), (4, 5290360), (5, 4232288), (8, 2645180), (10, 2116144), (16, 1322590), (19, 1113760), (20, 1058072), (32, 661295), (38, 556880), (40, 529036), (76, 278440), (80, 264518), (95, 222752), (152, 139220), (160, 132259), (190, 111376), (304, 69610), (380, 55688), (608, 34805), (760, 27844), (1520, 13922), (3040, 6961)]