21787823

素因数分解:

${\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{89}}^1\times {\mathrm{149}}^1$

素因数の和:322

約数の個数: 16

約数和(自身を含む): 23328000

約数和(自身を除く): 1540177

約数列:

[1, 31, 53, 89, 149, 1643, 2759, 4619, 4717, 7897, 13261, 146227, 244807, 411091, 702833, 21787823]

約数ペア:

[(1, 21787823), (31, 702833), (53, 411091), (89, 244807), (149, 146227), (1643, 13261), (2759, 7897), (4619, 4717)]