209216920

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{241}}^1\times {\mathrm{1973}}^1$

素因数の和:2236

約数の個数: 64

約数和(自身を含む): 515924640

約数和(自身を除く): 306707720

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 241, 440, 482, 964, 1205, 1928, 1973, 2410, 2651, 3946, 4820, 5302, 7892, 9640, 9865, 10604, 13255, 15784, 19730, 21208, 21703, 26510, 39460, 43406, 53020, 78920, 86812, 106040, 108515, 173624, 217030, 434060, 475493, 868120, 950986, 1901972, 2377465, 3803944, 4754930, 5230423, 9509860, 10460846, 19019720, 20921692, 26152115, 41843384, 52304230, 104608460, 209216920]

約数ペア:

[(1, 209216920), (2, 104608460), (4, 52304230), (5, 41843384), (8, 26152115), (10, 20921692), (11, 19019720), (20, 10460846), (22, 9509860), (40, 5230423), (44, 4754930), (55, 3803944), (88, 2377465), (110, 1901972), (220, 950986), (241, 868120), (440, 475493), (482, 434060), (964, 217030), (1205, 173624), (1928, 108515), (1973, 106040), (2410, 86812), (2651, 78920), (3946, 53020), (4820, 43406), (5302, 39460), (7892, 26510), (9640, 21703), (9865, 21208), (10604, 19730), (13255, 15784)]