21420009

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{59}}^1\times {\mathrm{107}}^1$

素因数の和:214

約数の個数: 48

約数和(自身を含む): 35380800

約数和(自身を除く): 13960791

約数列:

[1, 3, 9, 13, 29, 39, 59, 87, 107, 117, 177, 261, 321, 377, 531, 767, 963, 1131, 1391, 1711, 2301, 3103, 3393, 4173, 5133, 6313, 6903, 9309, 12519, 15399, 18939, 22243, 27927, 40339, 56817, 66729, 82069, 121017, 183077, 200187, 246207, 363051, 549231, 738621, 1647693, 2380001, 7140003, 21420009]

約数ペア:

[(1, 21420009), (3, 7140003), (9, 2380001), (13, 1647693), (29, 738621), (39, 549231), (59, 363051), (87, 246207), (107, 200187), (117, 183077), (177, 121017), (261, 82069), (321, 66729), (377, 56817), (531, 40339), (767, 27927), (963, 22243), (1131, 18939), (1391, 15399), (1711, 12519), (2301, 9309), (3103, 6903), (3393, 6313), (4173, 5133)]