20778880

素因数分解:

$2^7\times 5^1\times {\mathrm{32467}}^1$

素因数の和:32486

約数の個数: 32

約数和(自身を含む): 49676040

約数和(自身を除く): 28897160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 32467, 64934, 129868, 162335, 259736, 324670, 519472, 649340, 1038944, 1298680, 2077888, 2597360, 4155776, 5194720, 10389440, 20778880]

約数ペア:

[(1, 20778880), (2, 10389440), (4, 5194720), (5, 4155776), (8, 2597360), (10, 2077888), (16, 1298680), (20, 1038944), (32, 649340), (40, 519472), (64, 324670), (80, 259736), (128, 162335), (160, 129868), (320, 64934), (640, 32467)]