20426720

素因数分解:

$2^5\times 5^1\times {\mathrm{43}}^1\times {\mathrm{2969}}^1$

素因数の和:3027

約数の個数: 48

約数和(自身を含む): 49397040

約数和(自身を除く): 28970320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 43, 80, 86, 160, 172, 215, 344, 430, 688, 860, 1376, 1720, 2969, 3440, 5938, 6880, 11876, 14845, 23752, 29690, 47504, 59380, 95008, 118760, 127667, 237520, 255334, 475040, 510668, 638335, 1021336, 1276670, 2042672, 2553340, 4085344, 5106680, 10213360, 20426720]

約数ペア:

[(1, 20426720), (2, 10213360), (4, 5106680), (5, 4085344), (8, 2553340), (10, 2042672), (16, 1276670), (20, 1021336), (32, 638335), (40, 510668), (43, 475040), (80, 255334), (86, 237520), (160, 127667), (172, 118760), (215, 95008), (344, 59380), (430, 47504), (688, 29690), (860, 23752), (1376, 14845), (1720, 11876), (2969, 6880), (3440, 5938)]