18907551

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{401}}^1$

素因数の和:464

約数の個数: 36

約数和(自身を含む): 30603456

約数和(自身を除く): 11695905

約数列:

[1, 3, 9, 13, 31, 39, 93, 117, 169, 279, 401, 403, 507, 1203, 1209, 1521, 3609, 3627, 5213, 5239, 12431, 15639, 15717, 37293, 46917, 47151, 67769, 111879, 161603, 203307, 484809, 609921, 1454427, 2100839, 6302517, 18907551]

約数ペア:

[(1, 18907551), (3, 6302517), (9, 2100839), (13, 1454427), (31, 609921), (39, 484809), (93, 203307), (117, 161603), (169, 111879), (279, 67769), (401, 47151), (403, 46917), (507, 37293), (1203, 15717), (1209, 15639), (1521, 12431), (3609, 5239), (3627, 5213)]