21840104

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1123}}^1$

素因数の和:1170

約数の個数: 64

約数和(自身を含む): 50984640

約数和(自身を除く): 29144536

約数列:

[1, 2, 4, 8, 11, 13, 17, 22, 26, 34, 44, 52, 68, 88, 104, 136, 143, 187, 221, 286, 374, 442, 572, 748, 884, 1123, 1144, 1496, 1768, 2246, 2431, 4492, 4862, 8984, 9724, 12353, 14599, 19091, 19448, 24706, 29198, 38182, 49412, 58396, 76364, 98824, 116792, 152728, 160589, 210001, 248183, 321178, 420002, 496366, 642356, 840004, 992732, 1284712, 1680008, 1985464, 2730013, 5460026, 10920052, 21840104]

約数ペア:

[(1, 21840104), (2, 10920052), (4, 5460026), (8, 2730013), (11, 1985464), (13, 1680008), (17, 1284712), (22, 992732), (26, 840004), (34, 642356), (44, 496366), (52, 420002), (68, 321178), (88, 248183), (104, 210001), (136, 160589), (143, 152728), (187, 116792), (221, 98824), (286, 76364), (374, 58396), (442, 49412), (572, 38182), (748, 29198), (884, 24706), (1123, 19448), (1144, 19091), (1496, 14599), (1768, 12353), (2246, 9724), (2431, 8984), (4492, 4862)]