19879503

素因数分解:

$3^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1\times {\mathrm{199}}^1$

素因数の和:347

約数の個数: 32

約数和(自身を含む): 31334400

約数和(自身を除く): 11454897

約数列:

[1, 3, 7, 21, 67, 71, 199, 201, 213, 469, 497, 597, 1393, 1407, 1491, 4179, 4757, 13333, 14129, 14271, 33299, 39999, 42387, 93331, 98903, 99897, 279993, 296709, 946643, 2839929, 6626501, 19879503]

約数ペア:

[(1, 19879503), (3, 6626501), (7, 2839929), (21, 946643), (67, 296709), (71, 279993), (199, 99897), (201, 98903), (213, 93331), (469, 42387), (497, 39999), (597, 33299), (1393, 14271), (1407, 14129), (1491, 13333), (4179, 4757)]