19866220

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{1237}}^1$

素因数の和:1330

約数の個数: 48

約数和(自身を含む): 46172448

約数和(自身を除く): 26306228

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 73, 110, 146, 220, 292, 365, 730, 803, 1237, 1460, 1606, 2474, 3212, 4015, 4948, 6185, 8030, 12370, 13607, 16060, 24740, 27214, 54428, 68035, 90301, 136070, 180602, 272140, 361204, 451505, 903010, 993311, 1806020, 1986622, 3973244, 4966555, 9933110, 19866220]

約数ペア:

[(1, 19866220), (2, 9933110), (4, 4966555), (5, 3973244), (10, 1986622), (11, 1806020), (20, 993311), (22, 903010), (44, 451505), (55, 361204), (73, 272140), (110, 180602), (146, 136070), (220, 90301), (292, 68035), (365, 54428), (730, 27214), (803, 24740), (1237, 16060), (1460, 13607), (1606, 12370), (2474, 8030), (3212, 6185), (4015, 4948)]