21256520

素因数分解:

$2^3\times 5^1\times {\mathrm{59}}^1\times {\mathrm{9007}}^1$

素因数の和:9077

約数の個数: 32

約数和(自身を含む): 48643200

約数和(自身を除く): 27386680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 59, 118, 236, 295, 472, 590, 1180, 2360, 9007, 18014, 36028, 45035, 72056, 90070, 180140, 360280, 531413, 1062826, 2125652, 2657065, 4251304, 5314130, 10628260, 21256520]

約数ペア:

[(1, 21256520), (2, 10628260), (4, 5314130), (5, 4251304), (8, 2657065), (10, 2125652), (20, 1062826), (40, 531413), (59, 360280), (118, 180140), (236, 90070), (295, 72056), (472, 45035), (590, 36028), (1180, 18014), (2360, 9007)]