21540784

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{137}}^1\times {\mathrm{317}}^1$

素因数の和:493

約数の個数: 40

約数和(自身を含む): 43532928

約数和(自身を除く): 21992144

約数列:

[1, 2, 4, 8, 16, 31, 62, 124, 137, 248, 274, 317, 496, 548, 634, 1096, 1268, 2192, 2536, 4247, 5072, 8494, 9827, 16988, 19654, 33976, 39308, 43429, 67952, 78616, 86858, 157232, 173716, 347432, 694864, 1346299, 2692598, 5385196, 10770392, 21540784]

約数ペア:

[(1, 21540784), (2, 10770392), (4, 5385196), (8, 2692598), (16, 1346299), (31, 694864), (62, 347432), (124, 173716), (137, 157232), (248, 86858), (274, 78616), (317, 67952), (496, 43429), (548, 39308), (634, 33976), (1096, 19654), (1268, 16988), (2192, 9827), (2536, 8494), (4247, 5072)]