278318495

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{211}}^1\times {\mathrm{223}}^1$

素因数の和:472

約数の個数: 48

約数和(自身を含む): 417134592

約数和(自身を除く): 138816097

約数列:

[1, 5, 7, 13, 35, 65, 91, 169, 211, 223, 455, 845, 1055, 1115, 1183, 1477, 1561, 2743, 2899, 5915, 7385, 7805, 13715, 14495, 19201, 20293, 35659, 37687, 47053, 96005, 101465, 178295, 188435, 235265, 249613, 263809, 329371, 611689, 1248065, 1319045, 1646855, 3058445, 4281823, 7951957, 21409115, 39759785, 55663699, 278318495]

約数ペア:

[(1, 278318495), (5, 55663699), (7, 39759785), (13, 21409115), (35, 7951957), (65, 4281823), (91, 3058445), (169, 1646855), (211, 1319045), (223, 1248065), (455, 611689), (845, 329371), (1055, 263809), (1115, 249613), (1183, 235265), (1477, 188435), (1561, 178295), (2743, 101465), (2899, 96005), (5915, 47053), (7385, 37687), (7805, 35659), (13715, 20293), (14495, 19201)]