30721880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{109721}}^1$

素因数の和:109739

約数の個数: 32

約数和(自身を含む): 78999840

約数和(自身を除く): 48277960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 109721, 219442, 438884, 548605, 768047, 877768, 1097210, 1536094, 2194420, 3072188, 3840235, 4388840, 6144376, 7680470, 15360940, 30721880]

約数ペア:

[(1, 30721880), (2, 15360940), (4, 7680470), (5, 6144376), (7, 4388840), (8, 3840235), (10, 3072188), (14, 2194420), (20, 1536094), (28, 1097210), (35, 877768), (40, 768047), (56, 548605), (70, 438884), (140, 219442), (280, 109721)]