20804973

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{107}}^1\times {\mathrm{197}}^1$

素因数の和:361

約数の個数: 32

約数和(自身を含む): 32845824

約数和(自身を除く): 12040851

約数列:

[1, 3, 7, 21, 47, 107, 141, 197, 321, 329, 591, 749, 987, 1379, 2247, 4137, 5029, 9259, 15087, 21079, 27777, 35203, 63237, 64813, 105609, 147553, 194439, 442659, 990713, 2972139, 6934991, 20804973]

約数ペア:

[(1, 20804973), (3, 6934991), (7, 2972139), (21, 990713), (47, 442659), (107, 194439), (141, 147553), (197, 105609), (321, 64813), (329, 63237), (591, 35203), (749, 27777), (987, 21079), (1379, 15087), (2247, 9259), (4137, 5029)]