20804960

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{11821}}^1$

素因数の和:11847

約数の個数: 48

約数和(自身を含む): 53624592

約数和(自身を除く): 32819632

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 80, 88, 110, 160, 176, 220, 352, 440, 880, 1760, 11821, 23642, 47284, 59105, 94568, 118210, 130031, 189136, 236420, 260062, 378272, 472840, 520124, 650155, 945680, 1040248, 1300310, 1891360, 2080496, 2600620, 4160992, 5201240, 10402480, 20804960]

約数ペア:

[(1, 20804960), (2, 10402480), (4, 5201240), (5, 4160992), (8, 2600620), (10, 2080496), (11, 1891360), (16, 1300310), (20, 1040248), (22, 945680), (32, 650155), (40, 520124), (44, 472840), (55, 378272), (80, 260062), (88, 236420), (110, 189136), (160, 130031), (176, 118210), (220, 94568), (352, 59105), (440, 47284), (880, 23642), (1760, 11821)]