20413904

素因数分解:

$2^4\times 7^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{181}}^1$

素因数の和:268

約数の個数: 80

約数和(自身を含む): 48746880

約数和(自身を除く): 28332976

約数列:

[1, 2, 4, 7, 8, 14, 16, 19, 28, 38, 53, 56, 76, 106, 112, 133, 152, 181, 212, 266, 304, 362, 371, 424, 532, 724, 742, 848, 1007, 1064, 1267, 1448, 1484, 2014, 2128, 2534, 2896, 2968, 3439, 4028, 5068, 5936, 6878, 7049, 8056, 9593, 10136, 13756, 14098, 16112, 19186, 20272, 24073, 27512, 28196, 38372, 48146, 55024, 56392, 67151, 76744, 96292, 112784, 134302, 153488, 182267, 192584, 268604, 364534, 385168, 537208, 729068, 1074416, 1275869, 1458136, 2551738, 2916272, 5103476, 10206952, 20413904]

約数ペア:

[(1, 20413904), (2, 10206952), (4, 5103476), (7, 2916272), (8, 2551738), (14, 1458136), (16, 1275869), (19, 1074416), (28, 729068), (38, 537208), (53, 385168), (56, 364534), (76, 268604), (106, 192584), (112, 182267), (133, 153488), (152, 134302), (181, 112784), (212, 96292), (266, 76744), (304, 67151), (362, 56392), (371, 55024), (424, 48146), (532, 38372), (724, 28196), (742, 27512), (848, 24073), (1007, 20272), (1064, 19186), (1267, 16112), (1448, 14098), (1484, 13756), (2014, 10136), (2128, 9593), (2534, 8056), (2896, 7049), (2968, 6878), (3439, 5936), (4028, 5068)]