20707480

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{6553}}^1$

素因数の和:6643

約数の個数: 32

約数和(自身を含む): 47188800

約数和(自身を除く): 26481320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 316, 395, 632, 790, 1580, 3160, 6553, 13106, 26212, 32765, 52424, 65530, 131060, 262120, 517687, 1035374, 2070748, 2588435, 4141496, 5176870, 10353740, 20707480]

約数ペア:

[(1, 20707480), (2, 10353740), (4, 5176870), (5, 4141496), (8, 2588435), (10, 2070748), (20, 1035374), (40, 517687), (79, 262120), (158, 131060), (316, 65530), (395, 52424), (632, 32765), (790, 26212), (1580, 13106), (3160, 6553)]