20358009

素因数分解:

$3^2\times 7^1\times {\mathrm{59}}^1\times {\mathrm{5477}}^1$

素因数の和:5549

約数の個数: 24

約数和(自身を含む): 34182720

約数和(自身を除く): 13824711

約数列:

[1, 3, 7, 9, 21, 59, 63, 177, 413, 531, 1239, 3717, 5477, 16431, 38339, 49293, 115017, 323143, 345051, 969429, 2262001, 2908287, 6786003, 20358009]

約数ペア:

[(1, 20358009), (3, 6786003), (7, 2908287), (9, 2262001), (21, 969429), (59, 345051), (63, 323143), (177, 115017), (413, 49293), (531, 38339), (1239, 16431), (3717, 5477)]