388040

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{109}}^1$

素因数の和:209

約数の個数: 32

約数和(自身を含む): 891000

約数和(自身を除く): 502960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 109, 178, 218, 356, 436, 445, 545, 712, 872, 890, 1090, 1780, 2180, 3560, 4360, 9701, 19402, 38804, 48505, 77608, 97010, 194020, 388040]

約数ペア:

[(1, 388040), (2, 194020), (4, 97010), (5, 77608), (8, 48505), (10, 38804), (20, 19402), (40, 9701), (89, 4360), (109, 3560), (178, 2180), (218, 1780), (356, 1090), (436, 890), (445, 872), (545, 712)]