18978219

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{269}}^1$

素因数の和:361

約数の個数: 40

約数和(自身を含む): 31101840

約数和(自身を除く): 12123621

約数列:

[1, 3, 9, 13, 27, 39, 67, 81, 117, 201, 269, 351, 603, 807, 871, 1053, 1809, 2421, 2613, 3497, 5427, 7263, 7839, 10491, 18023, 21789, 23517, 31473, 54069, 70551, 94419, 162207, 234299, 283257, 486621, 702897, 1459863, 2108691, 6326073, 18978219]

約数ペア:

[(1, 18978219), (3, 6326073), (9, 2108691), (13, 1459863), (27, 702897), (39, 486621), (67, 283257), (81, 234299), (117, 162207), (201, 94419), (269, 70551), (351, 54069), (603, 31473), (807, 23517), (871, 21789), (1053, 18023), (1809, 10491), (2421, 7839), (2613, 7263), (3497, 5427)]