21457128

素因数分解:

$2^3\times 3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{683}}^1$

素因数の和:727

約数の個数: 128

約数和(自身を含む): 70917120

約数和(自身を除く): 49459992

約数列:

[1, 2, 3, 4, 6, 7, 8, 11, 12, 14, 17, 21, 22, 24, 28, 33, 34, 42, 44, 51, 56, 66, 68, 77, 84, 88, 102, 119, 132, 136, 154, 168, 187, 204, 231, 238, 264, 308, 357, 374, 408, 462, 476, 561, 616, 683, 714, 748, 924, 952, 1122, 1309, 1366, 1428, 1496, 1848, 2049, 2244, 2618, 2732, 2856, 3927, 4098, 4488, 4781, 5236, 5464, 7513, 7854, 8196, 9562, 10472, 11611, 14343, 15026, 15708, 16392, 19124, 22539, 23222, 28686, 30052, 31416, 34833, 38248, 45078, 46444, 52591, 57372, 60104, 69666, 81277, 90156, 92888, 105182, 114744, 127721, 139332, 157773, 162554, 180312, 210364, 243831, 255442, 278664, 315546, 325108, 383163, 420728, 487662, 510884, 631092, 650216, 766326, 894047, 975324, 1021768, 1262184, 1532652, 1788094, 1950648, 2682141, 3065304, 3576188, 5364282, 7152376, 10728564, 21457128]

約数ペア:

[(1, 21457128), (2, 10728564), (3, 7152376), (4, 5364282), (6, 3576188), (7, 3065304), (8, 2682141), (11, 1950648), (12, 1788094), (14, 1532652), (17, 1262184), (21, 1021768), (22, 975324), (24, 894047), (28, 766326), (33, 650216), (34, 631092), (42, 510884), (44, 487662), (51, 420728), (56, 383163), (66, 325108), (68, 315546), (77, 278664), (84, 255442), (88, 243831), (102, 210364), (119, 180312), (132, 162554), (136, 157773), (154, 139332), (168, 127721), (187, 114744), (204, 105182), (231, 92888), (238, 90156), (264, 81277), (308, 69666), (357, 60104), (374, 57372), (408, 52591), (462, 46444), (476, 45078), (561, 38248), (616, 34833), (683, 31416), (714, 30052), (748, 28686), (924, 23222), (952, 22539), (1122, 19124), (1309, 16392), (1366, 15708), (1428, 15026), (1496, 14343), (1848, 11611), (2049, 10472), (2244, 9562), (2618, 8196), (2732, 7854), (2856, 7513), (3927, 5464), (4098, 5236), (4488, 4781)]