1645267720

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{389}}^1\times {\mathrm{2459}}^1$

素因数の和:2902

約数の個数: 64

約数和(自身を含む): 3799224000

約数和(自身を除く): 2153956280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 389, 430, 778, 860, 1556, 1720, 1945, 2459, 3112, 3890, 4918, 7780, 9836, 12295, 15560, 16727, 19672, 24590, 33454, 49180, 66908, 83635, 98360, 105737, 133816, 167270, 211474, 334540, 422948, 528685, 669080, 845896, 956551, 1057370, 1913102, 2114740, 3826204, 4229480, 4782755, 7652408, 9565510, 19131020, 38262040, 41131693, 82263386, 164526772, 205658465, 329053544, 411316930, 822633860, 1645267720]

約数ペア:

[(1, 1645267720), (2, 822633860), (4, 411316930), (5, 329053544), (8, 205658465), (10, 164526772), (20, 82263386), (40, 41131693), (43, 38262040), (86, 19131020), (172, 9565510), (215, 7652408), (344, 4782755), (389, 4229480), (430, 3826204), (778, 2114740), (860, 1913102), (1556, 1057370), (1720, 956551), (1945, 845896), (2459, 669080), (3112, 528685), (3890, 422948), (4918, 334540), (7780, 211474), (9836, 167270), (12295, 133816), (15560, 105737), (16727, 98360), (19672, 83635), (24590, 66908), (33454, 49180)]