20821374

素因数分解:

$2^1\times 3^4\times 7^2\times {\mathrm{43}}^1\times {\mathrm{61}}^1$

素因数の和:132

約数の個数: 120

約数和(自身を含む): 56445048

約数和(自身を除く): 35623674

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 27, 42, 43, 49, 54, 61, 63, 81, 86, 98, 122, 126, 129, 147, 162, 183, 189, 258, 294, 301, 366, 378, 387, 427, 441, 549, 567, 602, 774, 854, 882, 903, 1098, 1134, 1161, 1281, 1323, 1647, 1806, 2107, 2322, 2562, 2623, 2646, 2709, 2989, 3294, 3483, 3843, 3969, 4214, 4941, 5246, 5418, 5978, 6321, 6966, 7686, 7869, 7938, 8127, 8967, 9882, 11529, 12642, 15738, 16254, 17934, 18361, 18963, 23058, 23607, 24381, 26901, 34587, 36722, 37926, 47214, 48762, 53802, 55083, 56889, 69174, 70821, 80703, 110166, 113778, 128527, 141642, 161406, 165249, 170667, 212463, 242109, 257054, 330498, 341334, 385581, 424926, 484218, 495747, 771162, 991494, 1156743, 1487241, 2313486, 2974482, 3470229, 6940458, 10410687, 20821374]

約数ペア:

[(1, 20821374), (2, 10410687), (3, 6940458), (6, 3470229), (7, 2974482), (9, 2313486), (14, 1487241), (18, 1156743), (21, 991494), (27, 771162), (42, 495747), (43, 484218), (49, 424926), (54, 385581), (61, 341334), (63, 330498), (81, 257054), (86, 242109), (98, 212463), (122, 170667), (126, 165249), (129, 161406), (147, 141642), (162, 128527), (183, 113778), (189, 110166), (258, 80703), (294, 70821), (301, 69174), (366, 56889), (378, 55083), (387, 53802), (427, 48762), (441, 47214), (549, 37926), (567, 36722), (602, 34587), (774, 26901), (854, 24381), (882, 23607), (903, 23058), (1098, 18963), (1134, 18361), (1161, 17934), (1281, 16254), (1323, 15738), (1647, 12642), (1806, 11529), (2107, 9882), (2322, 8967), (2562, 8127), (2623, 7938), (2646, 7869), (2709, 7686), (2989, 6966), (3294, 6321), (3483, 5978), (3843, 5418), (3969, 5246), (4214, 4941)]