20994393

素因数分解:

$3^1\times 7^2\times {\mathrm{251}}^1\times {\mathrm{569}}^1$

素因数の和:837

約数の個数: 24

約数和(自身を含む): 32749920

約数和(自身を除く): 11755527

約数列:

[1, 3, 7, 21, 49, 147, 251, 569, 753, 1707, 1757, 3983, 5271, 11949, 12299, 27881, 36897, 83643, 142819, 428457, 999733, 2999199, 6998131, 20994393]

約数ペア:

[(1, 20994393), (3, 6998131), (7, 2999199), (21, 999733), (49, 428457), (147, 142819), (251, 83643), (569, 36897), (753, 27881), (1707, 12299), (1757, 11949), (3983, 5271)]