18901975

素因数分解:

$5^2\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{463}}^1$

素因数の和:567

約数の個数: 24

約数和(自身を含む): 24855552

約数和(自身を除く): 5953577

約数列:

[1, 5, 23, 25, 71, 115, 355, 463, 575, 1633, 1775, 2315, 8165, 10649, 11575, 32873, 40825, 53245, 164365, 266225, 756079, 821825, 3780395, 18901975]

約数ペア:

[(1, 18901975), (5, 3780395), (23, 821825), (25, 756079), (71, 266225), (115, 164365), (355, 53245), (463, 40825), (575, 32873), (1633, 11575), (1775, 10649), (2315, 8165)]