647788323

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{349}}^1\times {\mathrm{523}}^1$

素因数の和:908

約数の個数: 48

約数和(自身を含む): 1073990400

約数和(自身を除く): 426202077

約数列:

[1, 3, 7, 13, 21, 39, 91, 169, 273, 349, 507, 523, 1047, 1183, 1569, 2443, 3549, 3661, 4537, 6799, 7329, 10983, 13611, 20397, 31759, 47593, 58981, 88387, 95277, 142779, 176943, 182527, 265161, 412867, 547581, 618709, 1238601, 1277689, 1856127, 2372851, 3833067, 7118553, 16609957, 30847063, 49829871, 92541189, 215929441, 647788323]

約数ペア:

[(1, 647788323), (3, 215929441), (7, 92541189), (13, 49829871), (21, 30847063), (39, 16609957), (91, 7118553), (169, 3833067), (273, 2372851), (349, 1856127), (507, 1277689), (523, 1238601), (1047, 618709), (1183, 547581), (1569, 412867), (2443, 265161), (3549, 182527), (3661, 176943), (4537, 142779), (6799, 95277), (7329, 88387), (10983, 58981), (13611, 47593), (20397, 31759)]