21391656

素因数分解:

$2^3\times 3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{271}}^1$

素因数の和:327

約数の個数: 128

約数和(自身を含む): 65802240

約数和(自身を除く): 44410584

約数列:

[1, 2, 3, 4, 6, 8, 11, 12, 13, 22, 23, 24, 26, 33, 39, 44, 46, 52, 66, 69, 78, 88, 92, 104, 132, 138, 143, 156, 184, 253, 264, 271, 276, 286, 299, 312, 429, 506, 542, 552, 572, 598, 759, 813, 858, 897, 1012, 1084, 1144, 1196, 1518, 1626, 1716, 1794, 2024, 2168, 2392, 2981, 3036, 3252, 3289, 3432, 3523, 3588, 5962, 6072, 6233, 6504, 6578, 7046, 7176, 8943, 9867, 10569, 11924, 12466, 13156, 14092, 17886, 18699, 19734, 21138, 23848, 24932, 26312, 28184, 35772, 37398, 38753, 39468, 42276, 49864, 68563, 71544, 74796, 77506, 78936, 81029, 84552, 116259, 137126, 149592, 155012, 162058, 205689, 232518, 243087, 274252, 310024, 324116, 411378, 465036, 486174, 548504, 648232, 822756, 891319, 930072, 972348, 1645512, 1782638, 1944696, 2673957, 3565276, 5347914, 7130552, 10695828, 21391656]

約数ペア:

[(1, 21391656), (2, 10695828), (3, 7130552), (4, 5347914), (6, 3565276), (8, 2673957), (11, 1944696), (12, 1782638), (13, 1645512), (22, 972348), (23, 930072), (24, 891319), (26, 822756), (33, 648232), (39, 548504), (44, 486174), (46, 465036), (52, 411378), (66, 324116), (69, 310024), (78, 274252), (88, 243087), (92, 232518), (104, 205689), (132, 162058), (138, 155012), (143, 149592), (156, 137126), (184, 116259), (253, 84552), (264, 81029), (271, 78936), (276, 77506), (286, 74796), (299, 71544), (312, 68563), (429, 49864), (506, 42276), (542, 39468), (552, 38753), (572, 37398), (598, 35772), (759, 28184), (813, 26312), (858, 24932), (897, 23848), (1012, 21138), (1084, 19734), (1144, 18699), (1196, 17886), (1518, 14092), (1626, 13156), (1716, 12466), (1794, 11924), (2024, 10569), (2168, 9867), (2392, 8943), (2981, 7176), (3036, 7046), (3252, 6578), (3289, 6504), (3432, 6233), (3523, 6072), (3588, 5962)]