20280456

素因数分解:

$2^3\times 3^4\times 7^1\times {\mathrm{17}}^1\times {\mathrm{263}}^1$

素因数の和:305

約数の個数: 160

約数和(自身を含む): 68999040

約数和(自身を除く): 48718584

約数列:

[1, 2, 3, 4, 6, 7, 8, 9, 12, 14, 17, 18, 21, 24, 27, 28, 34, 36, 42, 51, 54, 56, 63, 68, 72, 81, 84, 102, 108, 119, 126, 136, 153, 162, 168, 189, 204, 216, 238, 252, 263, 306, 324, 357, 378, 408, 459, 476, 504, 526, 567, 612, 648, 714, 756, 789, 918, 952, 1052, 1071, 1134, 1224, 1377, 1428, 1512, 1578, 1836, 1841, 2104, 2142, 2268, 2367, 2754, 2856, 3156, 3213, 3672, 3682, 4284, 4471, 4536, 4734, 5508, 5523, 6312, 6426, 7101, 7364, 8568, 8942, 9468, 9639, 11016, 11046, 12852, 13413, 14202, 14728, 16569, 17884, 18936, 19278, 21303, 22092, 25704, 26826, 28404, 31297, 33138, 35768, 38556, 40239, 42606, 44184, 49707, 53652, 56808, 62594, 66276, 77112, 80478, 85212, 93891, 99414, 107304, 120717, 125188, 132552, 149121, 160956, 170424, 187782, 198828, 241434, 250376, 281673, 298242, 321912, 362151, 375564, 397656, 482868, 563346, 596484, 724302, 751128, 845019, 965736, 1126692, 1192968, 1448604, 1690038, 2253384, 2535057, 2897208, 3380076, 5070114, 6760152, 10140228, 20280456]

約数ペア:

[(1, 20280456), (2, 10140228), (3, 6760152), (4, 5070114), (6, 3380076), (7, 2897208), (8, 2535057), (9, 2253384), (12, 1690038), (14, 1448604), (17, 1192968), (18, 1126692), (21, 965736), (24, 845019), (27, 751128), (28, 724302), (34, 596484), (36, 563346), (42, 482868), (51, 397656), (54, 375564), (56, 362151), (63, 321912), (68, 298242), (72, 281673), (81, 250376), (84, 241434), (102, 198828), (108, 187782), (119, 170424), (126, 160956), (136, 149121), (153, 132552), (162, 125188), (168, 120717), (189, 107304), (204, 99414), (216, 93891), (238, 85212), (252, 80478), (263, 77112), (306, 66276), (324, 62594), (357, 56808), (378, 53652), (408, 49707), (459, 44184), (476, 42606), (504, 40239), (526, 38556), (567, 35768), (612, 33138), (648, 31297), (714, 28404), (756, 26826), (789, 25704), (918, 22092), (952, 21303), (1052, 19278), (1071, 18936), (1134, 17884), (1224, 16569), (1377, 14728), (1428, 14202), (1512, 13413), (1578, 12852), (1836, 11046), (1841, 11016), (2104, 9639), (2142, 9468), (2268, 8942), (2367, 8568), (2754, 7364), (2856, 7101), (3156, 6426), (3213, 6312), (3672, 5523), (3682, 5508), (4284, 4734), (4471, 4536)]