21128228

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{127}}^1\times {\mathrm{199}}^1$

素因数の和:360

約数の個数: 48

約数和(自身を含む): 43008000

約数和(自身を除く): 21879772

約数列:

[1, 2, 4, 11, 19, 22, 38, 44, 76, 127, 199, 209, 254, 398, 418, 508, 796, 836, 1397, 2189, 2413, 2794, 3781, 4378, 4826, 5588, 7562, 8756, 9652, 15124, 25273, 26543, 41591, 50546, 53086, 83182, 101092, 106172, 166364, 278003, 480187, 556006, 960374, 1112012, 1920748, 5282057, 10564114, 21128228]

約数ペア:

[(1, 21128228), (2, 10564114), (4, 5282057), (11, 1920748), (19, 1112012), (22, 960374), (38, 556006), (44, 480187), (76, 278003), (127, 166364), (199, 106172), (209, 101092), (254, 83182), (398, 53086), (418, 50546), (508, 41591), (796, 26543), (836, 25273), (1397, 15124), (2189, 9652), (2413, 8756), (2794, 7562), (3781, 5588), (4378, 4826)]