21659990

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{223}}^1\times {\mathrm{883}}^1$

素因数の和:1124

約数の個数: 32

約数和(自身を含む): 42771456

約数和(自身を除く): 21111466

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 223, 446, 883, 1115, 1766, 2230, 2453, 4415, 4906, 8830, 9713, 12265, 19426, 24530, 48565, 97130, 196909, 393818, 984545, 1969090, 2165999, 4331998, 10829995, 21659990]

約数ペア:

[(1, 21659990), (2, 10829995), (5, 4331998), (10, 2165999), (11, 1969090), (22, 984545), (55, 393818), (110, 196909), (223, 97130), (446, 48565), (883, 24530), (1115, 19426), (1766, 12265), (2230, 9713), (2453, 8830), (4415, 4906)]