20653720

素因数分解:

$2^3\times 5^1\times {\mathrm{83}}^1\times {\mathrm{6221}}^1$

素因数の和:6315

約数の個数: 32

約数和(自身を含む): 47038320

約数和(自身を除く): 26384600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 83, 166, 332, 415, 664, 830, 1660, 3320, 6221, 12442, 24884, 31105, 49768, 62210, 124420, 248840, 516343, 1032686, 2065372, 2581715, 4130744, 5163430, 10326860, 20653720]

約数ペア:

[(1, 20653720), (2, 10326860), (4, 5163430), (5, 4130744), (8, 2581715), (10, 2065372), (20, 1032686), (40, 516343), (83, 248840), (166, 124420), (332, 62210), (415, 49768), (664, 31105), (830, 24884), (1660, 12442), (3320, 6221)]