21721660

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{47221}}^1$

素因数の和:47253

約数の個数: 24

約数和(自身を含む): 47599776

約数和(自身を除く): 25878116

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 115, 230, 460, 47221, 94442, 188884, 236105, 472210, 944420, 1086083, 2172166, 4344332, 5430415, 10860830, 21721660]

約数ペア:

[(1, 21721660), (2, 10860830), (4, 5430415), (5, 4344332), (10, 2172166), (20, 1086083), (23, 944420), (46, 472210), (92, 236105), (115, 188884), (230, 94442), (460, 47221)]