20975985

素因数分解:

$3^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{2969}}^1$

素因数の和:3137

約数の個数: 24

約数和(自身を含む): 36602280

約数和(自身を除く): 15626295

約数列:

[1, 3, 5, 9, 15, 45, 157, 471, 785, 1413, 2355, 2969, 7065, 8907, 14845, 26721, 44535, 133605, 466133, 1398399, 2330665, 4195197, 6991995, 20975985]

約数ペア:

[(1, 20975985), (3, 6991995), (5, 4195197), (9, 2330665), (15, 1398399), (45, 466133), (157, 133605), (471, 44535), (785, 26721), (1413, 14845), (2355, 8907), (2969, 7065)]