20508509

素因数分解:

$7^2\times {\mathrm{53}}^2\times {\mathrm{149}}^1$

素因数の和:269

約数の個数: 18

約数和(自身を含む): 24478650

約数和(自身を除く): 3970141

約数列:

[1, 7, 49, 53, 149, 371, 1043, 2597, 2809, 7301, 7897, 19663, 55279, 137641, 386953, 418541, 2929787, 20508509]

約数ペア:

[(1, 20508509), (7, 2929787), (49, 418541), (53, 386953), (149, 137641), (371, 55279), (1043, 19663), (2597, 7897), (2809, 7301)]