28127560

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{7901}}^1$

素因数の和:8001

約数の個数: 32

約数和(自身を含む): 64006200

約数和(自身を除く): 35878640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 7901, 15802, 31604, 39505, 63208, 79010, 158020, 316040, 703189, 1406378, 2812756, 3515945, 5625512, 7031890, 14063780, 28127560]

約数ペア:

[(1, 28127560), (2, 14063780), (4, 7031890), (5, 5625512), (8, 3515945), (10, 2812756), (20, 1406378), (40, 703189), (89, 316040), (178, 158020), (356, 79010), (445, 63208), (712, 39505), (890, 31604), (1780, 15802), (3560, 7901)]