21639640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{263}}^1$

素因数の和:313

約数の個数: 96

約数和(自身を含む): 56881440

約数和(自身を除く): 35241800

約数列:

[1, 2, 4, 5, 8, 10, 11, 17, 20, 22, 34, 40, 44, 55, 68, 85, 88, 110, 121, 136, 170, 187, 220, 242, 263, 340, 374, 440, 484, 526, 605, 680, 748, 935, 968, 1052, 1210, 1315, 1496, 1870, 2057, 2104, 2420, 2630, 2893, 3740, 4114, 4471, 4840, 5260, 5786, 7480, 8228, 8942, 10285, 10520, 11572, 14465, 16456, 17884, 20570, 22355, 23144, 28930, 31823, 35768, 41140, 44710, 49181, 57860, 63646, 82280, 89420, 98362, 115720, 127292, 159115, 178840, 196724, 245905, 254584, 318230, 393448, 491810, 540991, 636460, 983620, 1081982, 1272920, 1967240, 2163964, 2704955, 4327928, 5409910, 10819820, 21639640]

約数ペア:

[(1, 21639640), (2, 10819820), (4, 5409910), (5, 4327928), (8, 2704955), (10, 2163964), (11, 1967240), (17, 1272920), (20, 1081982), (22, 983620), (34, 636460), (40, 540991), (44, 491810), (55, 393448), (68, 318230), (85, 254584), (88, 245905), (110, 196724), (121, 178840), (136, 159115), (170, 127292), (187, 115720), (220, 98362), (242, 89420), (263, 82280), (340, 63646), (374, 57860), (440, 49181), (484, 44710), (526, 41140), (605, 35768), (680, 31823), (748, 28930), (935, 23144), (968, 22355), (1052, 20570), (1210, 17884), (1315, 16456), (1496, 14465), (1870, 11572), (2057, 10520), (2104, 10285), (2420, 8942), (2630, 8228), (2893, 7480), (3740, 5786), (4114, 5260), (4471, 4840)]