21022911

素因数分解:

$3^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{193}}^1$

素因数の和:245

約数の個数: 72

約数和(自身を含む): 40251120

約数和(自身を除く): 19228209

約数列:

[1, 3, 7, 9, 13, 19, 21, 39, 49, 57, 63, 91, 117, 133, 147, 171, 193, 247, 273, 399, 441, 579, 637, 741, 819, 931, 1197, 1351, 1729, 1737, 1911, 2223, 2509, 2793, 3667, 4053, 5187, 5733, 7527, 8379, 9457, 11001, 12103, 12159, 15561, 17563, 22581, 25669, 28371, 33003, 36309, 47671, 52689, 77007, 85113, 108927, 122941, 143013, 158067, 179683, 231021, 333697, 368823, 429039, 539049, 1001091, 1106469, 1617147, 2335879, 3003273, 7007637, 21022911]

約数ペア:

[(1, 21022911), (3, 7007637), (7, 3003273), (9, 2335879), (13, 1617147), (19, 1106469), (21, 1001091), (39, 539049), (49, 429039), (57, 368823), (63, 333697), (91, 231021), (117, 179683), (133, 158067), (147, 143013), (171, 122941), (193, 108927), (247, 85113), (273, 77007), (399, 52689), (441, 47671), (579, 36309), (637, 33003), (741, 28371), (819, 25669), (931, 22581), (1197, 17563), (1351, 15561), (1729, 12159), (1737, 12103), (1911, 11001), (2223, 9457), (2509, 8379), (2793, 7527), (3667, 5733), (4053, 5187)]