20017280

素因数分解:

$2^7\times 5^1\times {\mathrm{31277}}^1$

素因数の和:31296

約数の個数: 32

約数和(自身を含む): 47855340

約数和(自身を除く): 27838060

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 31277, 62554, 125108, 156385, 250216, 312770, 500432, 625540, 1000864, 1251080, 2001728, 2502160, 4003456, 5004320, 10008640, 20017280]

約数ペア:

[(1, 20017280), (2, 10008640), (4, 5004320), (5, 4003456), (8, 2502160), (10, 2001728), (16, 1251080), (20, 1000864), (32, 625540), (40, 500432), (64, 312770), (80, 250216), (128, 156385), (160, 125108), (320, 62554), (640, 31277)]