19778409

素因数分解:

$3^2\times 7^3\times {\mathrm{43}}^1\times {\mathrm{149}}^1$

素因数の和:219

約数の個数: 48

約数和(自身を含む): 34320000

約数和(自身を除く): 14541591

約数列:

[1, 3, 7, 9, 21, 43, 49, 63, 129, 147, 149, 301, 343, 387, 441, 447, 903, 1029, 1043, 1341, 2107, 2709, 3087, 3129, 6321, 6407, 7301, 9387, 14749, 18963, 19221, 21903, 44247, 44849, 51107, 57663, 65709, 132741, 134547, 153321, 313943, 403641, 459963, 941829, 2197601, 2825487, 6592803, 19778409]

約数ペア:

[(1, 19778409), (3, 6592803), (7, 2825487), (9, 2197601), (21, 941829), (43, 459963), (49, 403641), (63, 313943), (129, 153321), (147, 134547), (149, 132741), (301, 65709), (343, 57663), (387, 51107), (441, 44849), (447, 44247), (903, 21903), (1029, 19221), (1043, 18963), (1341, 14749), (2107, 9387), (2709, 7301), (3087, 6407), (3129, 6321)]