21305872

素因数分解:

$2^4\times 7^1\times {\mathrm{181}}^1\times {\mathrm{1051}}^1$

素因数の和:1247

約数の個数: 40

約数和(自身を含む): 47483072

約数和(自身を除く): 26177200

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 181, 362, 724, 1051, 1267, 1448, 2102, 2534, 2896, 4204, 5068, 7357, 8408, 10136, 14714, 16816, 20272, 29428, 58856, 117712, 190231, 380462, 760924, 1331617, 1521848, 2663234, 3043696, 5326468, 10652936, 21305872]

約数ペア:

[(1, 21305872), (2, 10652936), (4, 5326468), (7, 3043696), (8, 2663234), (14, 1521848), (16, 1331617), (28, 760924), (56, 380462), (112, 190231), (181, 117712), (362, 58856), (724, 29428), (1051, 20272), (1267, 16816), (1448, 14714), (2102, 10136), (2534, 8408), (2896, 7357), (4204, 5068)]