30917720

素因数分解:

$2^3\times 5^1\times {\mathrm{389}}^1\times {\mathrm{1987}}^1$

素因数の和:2387

約数の個数: 32

約数和(自身を含む): 69778800

約数和(自身を除く): 38861080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 389, 778, 1556, 1945, 1987, 3112, 3890, 3974, 7780, 7948, 9935, 15560, 15896, 19870, 39740, 79480, 772943, 1545886, 3091772, 3864715, 6183544, 7729430, 15458860, 30917720]

約数ペア:

[(1, 30917720), (2, 15458860), (4, 7729430), (5, 6183544), (8, 3864715), (10, 3091772), (20, 1545886), (40, 772943), (389, 79480), (778, 39740), (1556, 19870), (1945, 15896), (1987, 15560), (3112, 9935), (3890, 7948), (3974, 7780)]