21468920

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{827}}^1$

素因数の和:908

約数の個数: 64

約数和(自身を含む): 53654400

約数和(自身を除く): 32185480

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 59, 88, 110, 118, 220, 236, 295, 440, 472, 590, 649, 827, 1180, 1298, 1654, 2360, 2596, 3245, 3308, 4135, 5192, 6490, 6616, 8270, 9097, 12980, 16540, 18194, 25960, 33080, 36388, 45485, 48793, 72776, 90970, 97586, 181940, 195172, 243965, 363880, 390344, 487930, 536723, 975860, 1073446, 1951720, 2146892, 2683615, 4293784, 5367230, 10734460, 21468920]

約数ペア:

[(1, 21468920), (2, 10734460), (4, 5367230), (5, 4293784), (8, 2683615), (10, 2146892), (11, 1951720), (20, 1073446), (22, 975860), (40, 536723), (44, 487930), (55, 390344), (59, 363880), (88, 243965), (110, 195172), (118, 181940), (220, 97586), (236, 90970), (295, 72776), (440, 48793), (472, 45485), (590, 36388), (649, 33080), (827, 25960), (1180, 18194), (1298, 16540), (1654, 12980), (2360, 9097), (2596, 8270), (3245, 6616), (3308, 6490), (4135, 5192)]