19915520

素因数分解:

$2^8\times 5^1\times {\mathrm{15559}}^1$

素因数の和:15580

約数の個数: 36

約数和(自身を含む): 47706960

約数和(自身を除く): 27791440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 15559, 31118, 62236, 77795, 124472, 155590, 248944, 311180, 497888, 622360, 995776, 1244720, 1991552, 2489440, 3983104, 4978880, 9957760, 19915520]

約数ペア:

[(1, 19915520), (2, 9957760), (4, 4978880), (5, 3983104), (8, 2489440), (10, 1991552), (16, 1244720), (20, 995776), (32, 622360), (40, 497888), (64, 311180), (80, 248944), (128, 155590), (160, 124472), (256, 77795), (320, 62236), (640, 31118), (1280, 15559)]