20480140

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{16787}}^1$

素因数の和:16857

約数の個数: 24

約数和(自身を含む): 43715952

約数和(自身を除く): 23235812

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 16787, 33574, 67148, 83935, 167870, 335740, 1024007, 2048014, 4096028, 5120035, 10240070, 20480140]

約数ペア:

[(1, 20480140), (2, 10240070), (4, 5120035), (5, 4096028), (10, 2048014), (20, 1024007), (61, 335740), (122, 167870), (244, 83935), (305, 67148), (610, 33574), (1220, 16787)]