18215660

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{359}}^1$

素因数の和:470

約数の個数: 48

約数和(自身を含む): 39916800

約数和(自身を除く): 21701140

約数列:

[1, 2, 4, 5, 10, 20, 43, 59, 86, 118, 172, 215, 236, 295, 359, 430, 590, 718, 860, 1180, 1436, 1795, 2537, 3590, 5074, 7180, 10148, 12685, 15437, 21181, 25370, 30874, 42362, 50740, 61748, 77185, 84724, 105905, 154370, 211810, 308740, 423620, 910783, 1821566, 3643132, 4553915, 9107830, 18215660]

約数ペア:

[(1, 18215660), (2, 9107830), (4, 4553915), (5, 3643132), (10, 1821566), (20, 910783), (43, 423620), (59, 308740), (86, 211810), (118, 154370), (172, 105905), (215, 84724), (236, 77185), (295, 61748), (359, 50740), (430, 42362), (590, 30874), (718, 25370), (860, 21181), (1180, 15437), (1436, 12685), (1795, 10148), (2537, 7180), (3590, 5074)]