20905955

素因数分解:

$5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{479}}^1$

素因数の和:563

約数の個数: 32

約数和(自身を含む): 30412800

約数和(自身を除く): 9506845

約数列:

[1, 5, 7, 29, 35, 43, 145, 203, 215, 301, 479, 1015, 1247, 1505, 2395, 3353, 6235, 8729, 13891, 16765, 20597, 43645, 69455, 97237, 102985, 144179, 486185, 597313, 720895, 2986565, 4181191, 20905955]

約数ペア:

[(1, 20905955), (5, 4181191), (7, 2986565), (29, 720895), (35, 597313), (43, 486185), (145, 144179), (203, 102985), (215, 97237), (301, 69455), (479, 43645), (1015, 20597), (1247, 16765), (1505, 13891), (2395, 8729), (3353, 6235)]