21451225

素因数分解:

$5^2\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{311}}^1$

素因数の和:441

約数の個数: 24

約数和(自身を含む): 27855360

約数和(自身を除く): 6404135

約数列:

[1, 5, 25, 31, 89, 155, 311, 445, 775, 1555, 2225, 2759, 7775, 9641, 13795, 27679, 48205, 68975, 138395, 241025, 691975, 858049, 4290245, 21451225]

約数ペア:

[(1, 21451225), (5, 4290245), (25, 858049), (31, 691975), (89, 241025), (155, 138395), (311, 68975), (445, 48205), (775, 27679), (1555, 13795), (2225, 9641), (2759, 7775)]