21242240

素因数分解:

$2^7\times 5^1\times {\mathrm{33191}}^1$

素因数の和:33210

約数の個数: 32

約数和(自身を含む): 50783760

約数和(自身を除く): 29541520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 33191, 66382, 132764, 165955, 265528, 331910, 531056, 663820, 1062112, 1327640, 2124224, 2655280, 4248448, 5310560, 10621120, 21242240]

約数ペア:

[(1, 21242240), (2, 10621120), (4, 5310560), (5, 4248448), (8, 2655280), (10, 2124224), (16, 1327640), (20, 1062112), (32, 663820), (40, 531056), (64, 331910), (80, 265528), (128, 165955), (160, 132764), (320, 66382), (640, 33191)]