388288520

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{89057}}^1$

素因数の和:89177

約数の個数: 32

約数和(自身を含む): 881674200

約数和(自身を除く): 493385680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4360, 89057, 178114, 356228, 445285, 712456, 890570, 1781140, 3562280, 9707213, 19414426, 38828852, 48536065, 77657704, 97072130, 194144260, 388288520]

約数ペア:

[(1, 388288520), (2, 194144260), (4, 97072130), (5, 77657704), (8, 48536065), (10, 38828852), (20, 19414426), (40, 9707213), (109, 3562280), (218, 1781140), (436, 890570), (545, 712456), (872, 445285), (1090, 356228), (2180, 178114), (4360, 89057)]