20581568

素因数分解:

$2^6\times 7^2\times {\mathrm{6563}}^1$

素因数の和:6589

約数の個数: 42

約数和(自身を含む): 47516796

約数和(自身を除く): 26935228

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 49, 56, 64, 98, 112, 196, 224, 392, 448, 784, 1568, 3136, 6563, 13126, 26252, 45941, 52504, 91882, 105008, 183764, 210016, 321587, 367528, 420032, 643174, 735056, 1286348, 1470112, 2572696, 2940224, 5145392, 10290784, 20581568]

約数ペア:

[(1, 20581568), (2, 10290784), (4, 5145392), (7, 2940224), (8, 2572696), (14, 1470112), (16, 1286348), (28, 735056), (32, 643174), (49, 420032), (56, 367528), (64, 321587), (98, 210016), (112, 183764), (196, 105008), (224, 91882), (392, 52504), (448, 45941), (784, 26252), (1568, 13126), (3136, 6563)]