81939123

素因数分解:

$3^2\times 7^2\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{149}}^1$

素因数の和:241

約数の個数: 72

約数和(自身を含む): 146718000

約数和(自身を除く): 64778877

約数列:

[1, 3, 7, 9, 21, 29, 43, 49, 63, 87, 129, 147, 149, 203, 261, 301, 387, 441, 447, 609, 903, 1043, 1247, 1341, 1421, 1827, 2107, 2709, 3129, 3741, 4263, 4321, 6321, 6407, 7301, 8729, 9387, 11223, 12789, 12963, 18963, 19221, 21903, 26187, 30247, 38889, 44849, 57663, 61103, 65709, 78561, 90741, 134547, 183309, 185803, 211729, 272223, 313943, 403641, 549927, 557409, 635187, 941829, 1300621, 1672227, 1905561, 2825487, 3901863, 9104347, 11705589, 27313041, 81939123]

約数ペア:

[(1, 81939123), (3, 27313041), (7, 11705589), (9, 9104347), (21, 3901863), (29, 2825487), (43, 1905561), (49, 1672227), (63, 1300621), (87, 941829), (129, 635187), (147, 557409), (149, 549927), (203, 403641), (261, 313943), (301, 272223), (387, 211729), (441, 185803), (447, 183309), (609, 134547), (903, 90741), (1043, 78561), (1247, 65709), (1341, 61103), (1421, 57663), (1827, 44849), (2107, 38889), (2709, 30247), (3129, 26187), (3741, 21903), (4263, 19221), (4321, 18963), (6321, 12963), (6407, 12789), (7301, 11223), (8729, 9387)]