217430787

素因数分解:

$3^1\times 7^3\times {\mathrm{131}}^1\times {\mathrm{1613}}^1$

素因数の和:1768

約数の個数: 32

約数和(自身を含む): 340876800

約数和(自身を除く): 123446013

約数列:

[1, 3, 7, 21, 49, 131, 147, 343, 393, 917, 1029, 1613, 2751, 4839, 6419, 11291, 19257, 33873, 44933, 79037, 134799, 211303, 237111, 553259, 633909, 1479121, 1659777, 4437363, 10353847, 31061541, 72476929, 217430787]

約数ペア:

[(1, 217430787), (3, 72476929), (7, 31061541), (21, 10353847), (49, 4437363), (131, 1659777), (147, 1479121), (343, 633909), (393, 553259), (917, 237111), (1029, 211303), (1613, 134799), (2751, 79037), (4839, 44933), (6419, 33873), (11291, 19257)]