19728216

素因数分解:

$2^3\times 3^2\times {\mathrm{41}}^2\times {\mathrm{163}}^1$

素因数の和:257

約数の個数: 72

約数和(自身を含む): 55101540

約数和(自身を除く): 35373324

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 41, 72, 82, 123, 163, 164, 246, 326, 328, 369, 489, 492, 652, 738, 978, 984, 1304, 1467, 1476, 1681, 1956, 2934, 2952, 3362, 3912, 5043, 5868, 6683, 6724, 10086, 11736, 13366, 13448, 15129, 20049, 20172, 26732, 30258, 40098, 40344, 53464, 60147, 60516, 80196, 120294, 121032, 160392, 240588, 274003, 481176, 548006, 822009, 1096012, 1644018, 2192024, 2466027, 3288036, 4932054, 6576072, 9864108, 19728216]

約数ペア:

[(1, 19728216), (2, 9864108), (3, 6576072), (4, 4932054), (6, 3288036), (8, 2466027), (9, 2192024), (12, 1644018), (18, 1096012), (24, 822009), (36, 548006), (41, 481176), (72, 274003), (82, 240588), (123, 160392), (163, 121032), (164, 120294), (246, 80196), (326, 60516), (328, 60147), (369, 53464), (489, 40344), (492, 40098), (652, 30258), (738, 26732), (978, 20172), (984, 20049), (1304, 15129), (1467, 13448), (1476, 13366), (1681, 11736), (1956, 10086), (2934, 6724), (2952, 6683), (3362, 5868), (3912, 5043)]