20430520

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{787}}^1$

素因数の和:868

約数の個数: 64

約数和(自身を含む): 51062400

約数和(自身を除く): 30631880

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 59, 88, 110, 118, 220, 236, 295, 440, 472, 590, 649, 787, 1180, 1298, 1574, 2360, 2596, 3148, 3245, 3935, 5192, 6296, 6490, 7870, 8657, 12980, 15740, 17314, 25960, 31480, 34628, 43285, 46433, 69256, 86570, 92866, 173140, 185732, 232165, 346280, 371464, 464330, 510763, 928660, 1021526, 1857320, 2043052, 2553815, 4086104, 5107630, 10215260, 20430520]

約数ペア:

[(1, 20430520), (2, 10215260), (4, 5107630), (5, 4086104), (8, 2553815), (10, 2043052), (11, 1857320), (20, 1021526), (22, 928660), (40, 510763), (44, 464330), (55, 371464), (59, 346280), (88, 232165), (110, 185732), (118, 173140), (220, 92866), (236, 86570), (295, 69256), (440, 46433), (472, 43285), (590, 34628), (649, 31480), (787, 25960), (1180, 17314), (1298, 15740), (1574, 12980), (2360, 8657), (2596, 7870), (3148, 6490), (3245, 6296), (3935, 5192)]