20866240

素因数分解:

$2^6\times 5^1\times {\mathrm{197}}^1\times {\mathrm{331}}^1$

素因数の和:545

約数の個数: 56

約数和(自身を含む): 50090832

約数和(自身を除く): 29224592

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 197, 320, 331, 394, 662, 788, 985, 1324, 1576, 1655, 1970, 2648, 3152, 3310, 3940, 5296, 6304, 6620, 7880, 10592, 12608, 13240, 15760, 21184, 26480, 31520, 52960, 63040, 65207, 105920, 130414, 260828, 326035, 521656, 652070, 1043312, 1304140, 2086624, 2608280, 4173248, 5216560, 10433120, 20866240]

約数ペア:

[(1, 20866240), (2, 10433120), (4, 5216560), (5, 4173248), (8, 2608280), (10, 2086624), (16, 1304140), (20, 1043312), (32, 652070), (40, 521656), (64, 326035), (80, 260828), (160, 130414), (197, 105920), (320, 65207), (331, 63040), (394, 52960), (662, 31520), (788, 26480), (985, 21184), (1324, 15760), (1576, 13240), (1655, 12608), (1970, 10592), (2648, 7880), (3152, 6620), (3310, 6304), (3940, 5296)]