1261308520

素因数分解:

$2^3\times 5^1\times {\mathrm{641}}^1\times {\mathrm{49193}}^1$

素因数の和:49845

約数の個数: 32

約数和(自身を含む): 2842429320

約数和(自身を除く): 1581120800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 641, 1282, 2564, 3205, 5128, 6410, 12820, 25640, 49193, 98386, 196772, 245965, 393544, 491930, 983860, 1967720, 31532713, 63065426, 126130852, 157663565, 252261704, 315327130, 630654260, 1261308520]

約数ペア:

[(1, 1261308520), (2, 630654260), (4, 315327130), (5, 252261704), (8, 157663565), (10, 126130852), (20, 63065426), (40, 31532713), (641, 1967720), (1282, 983860), (2564, 491930), (3205, 393544), (5128, 245965), (6410, 196772), (12820, 98386), (25640, 49193)]