21778256

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{1009}}^1$

素因数の和:1107

約数の個数: 40

約数和(自身を含む): 45086400

約数和(自身を除く): 23308144

約数列:

[1, 2, 4, 8, 16, 19, 38, 71, 76, 142, 152, 284, 304, 568, 1009, 1136, 1349, 2018, 2698, 4036, 5396, 8072, 10792, 16144, 19171, 21584, 38342, 71639, 76684, 143278, 153368, 286556, 306736, 573112, 1146224, 1361141, 2722282, 5444564, 10889128, 21778256]

約数ペア:

[(1, 21778256), (2, 10889128), (4, 5444564), (8, 2722282), (16, 1361141), (19, 1146224), (38, 573112), (71, 306736), (76, 286556), (142, 153368), (152, 143278), (284, 76684), (304, 71639), (568, 38342), (1009, 21584), (1136, 19171), (1349, 16144), (2018, 10792), (2698, 8072), (4036, 5396)]