19991556

素因数分解:

$2^2\times 3^3\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{491}}^1$

素因数の和:546

約数の個数: 96

約数和(自身を含む): 57859200

約数和(自身を除く): 37867644

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 27, 29, 36, 39, 52, 54, 58, 78, 87, 108, 116, 117, 156, 174, 234, 261, 348, 351, 377, 468, 491, 522, 702, 754, 783, 982, 1044, 1131, 1404, 1473, 1508, 1566, 1964, 2262, 2946, 3132, 3393, 4419, 4524, 5892, 6383, 6786, 8838, 10179, 12766, 13257, 13572, 14239, 17676, 19149, 20358, 25532, 26514, 28478, 38298, 40716, 42717, 53028, 56956, 57447, 76596, 85434, 114894, 128151, 170868, 172341, 185107, 229788, 256302, 344682, 370214, 384453, 512604, 555321, 689364, 740428, 768906, 1110642, 1537812, 1665963, 2221284, 3331926, 4997889, 6663852, 9995778, 19991556]

約数ペア:

[(1, 19991556), (2, 9995778), (3, 6663852), (4, 4997889), (6, 3331926), (9, 2221284), (12, 1665963), (13, 1537812), (18, 1110642), (26, 768906), (27, 740428), (29, 689364), (36, 555321), (39, 512604), (52, 384453), (54, 370214), (58, 344682), (78, 256302), (87, 229788), (108, 185107), (116, 172341), (117, 170868), (156, 128151), (174, 114894), (234, 85434), (261, 76596), (348, 57447), (351, 56956), (377, 53028), (468, 42717), (491, 40716), (522, 38298), (702, 28478), (754, 26514), (783, 25532), (982, 20358), (1044, 19149), (1131, 17676), (1404, 14239), (1473, 13572), (1508, 13257), (1566, 12766), (1964, 10179), (2262, 8838), (2946, 6786), (3132, 6383), (3393, 5892), (4419, 4524)]