20128199420

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{109}}^1\times {\mathrm{188431}}^1$

素因数の和:188563

約数の個数: 72

約数和(自身を含む): 49621682880

約数和(自身を除く): 29493483460

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 109, 140, 196, 218, 245, 436, 490, 545, 763, 980, 1090, 1526, 2180, 3052, 3815, 5341, 7630, 10682, 15260, 21364, 26705, 53410, 106820, 188431, 376862, 753724, 942155, 1319017, 1884310, 2638034, 3768620, 5276068, 6595085, 9233119, 13190170, 18466238, 20538979, 26380340, 36932476, 41077958, 46165595, 82155916, 92331190, 102694895, 143772853, 184662380, 205389790, 287545706, 410779580, 575091412, 718864265, 1006409971, 1437728530, 2012819942, 2875457060, 4025639884, 5032049855, 10064099710, 20128199420]

約数ペア:

[(1, 20128199420), (2, 10064099710), (4, 5032049855), (5, 4025639884), (7, 2875457060), (10, 2012819942), (14, 1437728530), (20, 1006409971), (28, 718864265), (35, 575091412), (49, 410779580), (70, 287545706), (98, 205389790), (109, 184662380), (140, 143772853), (196, 102694895), (218, 92331190), (245, 82155916), (436, 46165595), (490, 41077958), (545, 36932476), (763, 26380340), (980, 20538979), (1090, 18466238), (1526, 13190170), (2180, 9233119), (3052, 6595085), (3815, 5276068), (5341, 3768620), (7630, 2638034), (10682, 1884310), (15260, 1319017), (21364, 942155), (26705, 753724), (53410, 376862), (106820, 188431)]