21188728

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{47}}^2\times {\mathrm{109}}^1$

素因数の和:220

約数の個数: 48

約数和(自身を含む): 44688600

約数和(自身を除く): 23499872

約数列:

[1, 2, 4, 8, 11, 22, 44, 47, 88, 94, 109, 188, 218, 376, 436, 517, 872, 1034, 1199, 2068, 2209, 2398, 4136, 4418, 4796, 5123, 8836, 9592, 10246, 17672, 20492, 24299, 40984, 48598, 56353, 97196, 112706, 194392, 225412, 240781, 450824, 481562, 963124, 1926248, 2648591, 5297182, 10594364, 21188728]

約数ペア:

[(1, 21188728), (2, 10594364), (4, 5297182), (8, 2648591), (11, 1926248), (22, 963124), (44, 481562), (47, 450824), (88, 240781), (94, 225412), (109, 194392), (188, 112706), (218, 97196), (376, 56353), (436, 48598), (517, 40984), (872, 24299), (1034, 20492), (1199, 17672), (2068, 10246), (2209, 9592), (2398, 8836), (4136, 5123), (4418, 4796)]