20209905

素因数分解:

$3^4\times 5^1\times {\mathrm{139}}^1\times {\mathrm{359}}^1$

素因数の和:515

約数の個数: 40

約数和(自身を含む): 36590400

約数和(自身を除く): 16380495

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 139, 359, 405, 417, 695, 1077, 1251, 1795, 2085, 3231, 3753, 5385, 6255, 9693, 11259, 16155, 18765, 29079, 48465, 49901, 56295, 145395, 149703, 249505, 449109, 748515, 1347327, 2245545, 4041981, 6736635, 20209905]

約数ペア:

[(1, 20209905), (3, 6736635), (5, 4041981), (9, 2245545), (15, 1347327), (27, 748515), (45, 449109), (81, 249505), (135, 149703), (139, 145395), (359, 56295), (405, 49901), (417, 48465), (695, 29079), (1077, 18765), (1251, 16155), (1795, 11259), (2085, 9693), (3231, 6255), (3753, 5385)]