21405296

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{121621}}^1$

素因数の和:121640

約数の個数: 20

約数和(自身を含む): 45243384

約数和(自身を除く): 23838088

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 88, 176, 121621, 243242, 486484, 972968, 1337831, 1945936, 2675662, 5351324, 10702648, 21405296]

約数ペア:

[(1, 21405296), (2, 10702648), (4, 5351324), (8, 2675662), (11, 1945936), (16, 1337831), (22, 972968), (44, 486484), (88, 243242), (176, 121621)]