21571074

素因数分解:

$2^1\times 3^2\times 7^2\times {\mathrm{37}}^1\times {\mathrm{661}}^1$

素因数の和:720

約数の個数: 72

約数和(自身を含む): 55921788

約数和(自身を除く): 34350714

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 37, 42, 49, 63, 74, 98, 111, 126, 147, 222, 259, 294, 333, 441, 518, 661, 666, 777, 882, 1322, 1554, 1813, 1983, 2331, 3626, 3966, 4627, 4662, 5439, 5949, 9254, 10878, 11898, 13881, 16317, 24457, 27762, 32389, 32634, 41643, 48914, 64778, 73371, 83286, 97167, 146742, 171199, 194334, 220113, 291501, 342398, 440226, 513597, 583002, 1027194, 1198393, 1540791, 2396786, 3081582, 3595179, 7190358, 10785537, 21571074]

約数ペア:

[(1, 21571074), (2, 10785537), (3, 7190358), (6, 3595179), (7, 3081582), (9, 2396786), (14, 1540791), (18, 1198393), (21, 1027194), (37, 583002), (42, 513597), (49, 440226), (63, 342398), (74, 291501), (98, 220113), (111, 194334), (126, 171199), (147, 146742), (222, 97167), (259, 83286), (294, 73371), (333, 64778), (441, 48914), (518, 41643), (661, 32634), (666, 32389), (777, 27762), (882, 24457), (1322, 16317), (1554, 13881), (1813, 11898), (1983, 10878), (2331, 9254), (3626, 5949), (3966, 5439), (4627, 4662)]