21409115

素因数分解:

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

素因数の和:459

約数の個数: 32

約数和(自身を含む): 31911936

約数和(自身を除く): 10502821

約数列:

[1, 5, 7, 13, 35, 65, 91, 211, 223, 455, 1055, 1115, 1477, 1561, 2743, 2899, 7385, 7805, 13715, 14495, 19201, 20293, 47053, 96005, 101465, 235265, 329371, 611689, 1646855, 3058445, 4281823, 21409115]

約数ペア:

[(1, 21409115), (5, 4281823), (7, 3058445), (13, 1646855), (35, 611689), (65, 329371), (91, 235265), (211, 101465), (223, 96005), (455, 47053), (1055, 20293), (1115, 19201), (1477, 14495), (1561, 13715), (2743, 7805), (2899, 7385)]