20902040

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{487}}^1$

素因数の和:564

約数の個数: 64

約数和(自身を含む): 50068800

約数和(自身を除く): 29166760

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 37, 40, 58, 74, 116, 145, 148, 185, 232, 290, 296, 370, 487, 580, 740, 974, 1073, 1160, 1480, 1948, 2146, 2435, 3896, 4292, 4870, 5365, 8584, 9740, 10730, 14123, 18019, 19480, 21460, 28246, 36038, 42920, 56492, 70615, 72076, 90095, 112984, 141230, 144152, 180190, 282460, 360380, 522551, 564920, 720760, 1045102, 2090204, 2612755, 4180408, 5225510, 10451020, 20902040]

約数ペア:

[(1, 20902040), (2, 10451020), (4, 5225510), (5, 4180408), (8, 2612755), (10, 2090204), (20, 1045102), (29, 720760), (37, 564920), (40, 522551), (58, 360380), (74, 282460), (116, 180190), (145, 144152), (148, 141230), (185, 112984), (232, 90095), (290, 72076), (296, 70615), (370, 56492), (487, 42920), (580, 36038), (740, 28246), (974, 21460), (1073, 19480), (1160, 18019), (1480, 14123), (1948, 10730), (2146, 9740), (2435, 8584), (3896, 5365), (4292, 4870)]