19947928

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1$

素因数の和:137

約数の個数: 128

約数和(自身を含む): 52254720

約数和(自身を除く): 32306792

約数列:

[1, 2, 4, 7, 8, 11, 13, 14, 22, 26, 28, 44, 47, 52, 53, 56, 77, 88, 91, 94, 104, 106, 143, 154, 182, 188, 212, 286, 308, 329, 364, 371, 376, 424, 517, 572, 583, 611, 616, 658, 689, 728, 742, 1001, 1034, 1144, 1166, 1222, 1316, 1378, 1484, 2002, 2068, 2332, 2444, 2491, 2632, 2756, 2968, 3619, 4004, 4081, 4136, 4277, 4664, 4823, 4888, 4982, 5512, 6721, 7238, 7579, 8008, 8162, 8554, 9646, 9964, 13442, 14476, 15158, 16324, 17108, 17437, 19292, 19928, 26884, 27401, 28952, 30316, 32383, 32648, 34216, 34874, 38584, 47047, 53053, 53768, 54802, 60632, 64766, 69748, 94094, 106106, 109604, 129532, 139496, 188188, 191807, 212212, 219208, 226681, 259064, 356213, 376376, 383614, 424424, 453362, 712426, 767228, 906724, 1424852, 1534456, 1813448, 2493491, 2849704, 4986982, 9973964, 19947928]

約数ペア:

[(1, 19947928), (2, 9973964), (4, 4986982), (7, 2849704), (8, 2493491), (11, 1813448), (13, 1534456), (14, 1424852), (22, 906724), (26, 767228), (28, 712426), (44, 453362), (47, 424424), (52, 383614), (53, 376376), (56, 356213), (77, 259064), (88, 226681), (91, 219208), (94, 212212), (104, 191807), (106, 188188), (143, 139496), (154, 129532), (182, 109604), (188, 106106), (212, 94094), (286, 69748), (308, 64766), (329, 60632), (364, 54802), (371, 53768), (376, 53053), (424, 47047), (517, 38584), (572, 34874), (583, 34216), (611, 32648), (616, 32383), (658, 30316), (689, 28952), (728, 27401), (742, 26884), (1001, 19928), (1034, 19292), (1144, 17437), (1166, 17108), (1222, 16324), (1316, 15158), (1378, 14476), (1484, 13442), (2002, 9964), (2068, 9646), (2332, 8554), (2444, 8162), (2491, 8008), (2632, 7579), (2756, 7238), (2968, 6721), (3619, 5512), (4004, 4982), (4081, 4888), (4136, 4823), (4277, 4664)]