81420975

素因数分解:

$3^2\times 5^2\times {\mathrm{361871}}^1$

素因数の和:361887

約数の個数: 18

約数和(自身を含む): 145834416

約数和(自身を除く): 64413441

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 225, 361871, 1085613, 1809355, 3256839, 5428065, 9046775, 16284195, 27140325, 81420975]

約数ペア:

[(1, 81420975), (3, 27140325), (5, 16284195), (9, 9046775), (15, 5428065), (25, 3256839), (45, 1809355), (75, 1085613), (225, 361871)]