20687985

素因数分解:

$3^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{11213}}^1$

素因数の和:11265

約数の個数: 24

約数和(自身を含む): 36737064

約数和(自身を除く): 16049079

約数列:

[1, 3, 5, 9, 15, 41, 45, 123, 205, 369, 615, 1845, 11213, 33639, 56065, 100917, 168195, 459733, 504585, 1379199, 2298665, 4137597, 6895995, 20687985]

約数ペア:

[(1, 20687985), (3, 6895995), (5, 4137597), (9, 2298665), (15, 1379199), (41, 504585), (45, 459733), (123, 168195), (205, 100917), (369, 56065), (615, 33639), (1845, 11213)]